Infrastructre: reformat cache save action (Mudlet#7545)

<!-- Keep the title short & concise so anyone non-technical can
understand it,
     the title appears in PTB changelogs -->
#### Brief overview of PR changes/additions
Reformat cache save action to use the recommended
https://github.com/actions/cache/tree/main/save#always-save-cache way
#### Motivation for adding to Mudlet
Removing a build warning
#### Other info (issues closed, discussion etc)

---------

Co-authored-by: Vadim Peretokin <[email protected]>

.github/workflows/build-mudlet-win.yml

@@ -56,13 +56,13 @@ jobs:
         $GITHUB_WORKSPACE/CI/setup-windows-sdk.sh
         $GITHUB_WORKSPACE/CI/validate-deployment-for-windows.sh
 
-    - name: restore ccache
-      uses: actions/cache@v4
+    - name: Restore ccache
+      id: restore-ccache
+      uses: actions/cache/restore@v4
       with:
         path: ${{runner.workspace}}/ccache
         key: ccache-${{matrix.os}}-${{matrix.buildname}}-${{ github.sha }}
         restore-keys: ccache-${{matrix.os}}-${{matrix.buildname}}
-        save-always: true
 
     - name: (Windows) Build
       shell: msys2 {0}
@@ -73,6 +73,13 @@ jobs:
         GITHUB_PULL_REQUEST_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
       run: $GITHUB_WORKSPACE/CI/build-mudlet-for-windows.sh
 
+    - name: Save ccache
+      if: always() && steps.restore-ccache.outputs.cache-hit != 'true'
+      uses: actions/cache/save@v4
+      with:
+        path: ${{runner.workspace}}/ccache
+        key: ${{ steps.restore-ccache.outputs.cache-primary-key }}
+
     - name: (Windows) Package
       shell: msys2 {0}
       run: $GITHUB_WORKSPACE/CI/package-mudlet-for-windows.sh
@@ -114,9 +121,6 @@ jobs:
         name: ${{env.UPLOAD_FILENAME}}
         path: ${{env.FOLDER_TO_UPLOAD}}
 
-    #- name: Setup tmate session
-    #  uses: mxschmitt/action-tmate@v3
-
     - name: Submit to make.mudlet.org
       if: env.UPLOAD_FILENAME
       run: |

.github/workflows/build-mudlet.yml

@@ -76,17 +76,16 @@ jobs:
         modules: ${{ startsWith(matrix.qt, '6') && 'qt5compat qtmultimedia' || '' }}
 
     - name: Restore Boost cache
-      uses: actions/cache@v4
-      id: cache-boost
+      id: restore-boost
+      uses: actions/cache/restore@v4
       with:
         path: ${{env.BOOST_ROOT}}
         key: boost
 
     - name: Install Boost
-      if: steps.cache-boost.outputs.cache-hit != 'true'
+      if: steps.restore-boost.outputs.cache-hit != 'true'
       run: |
         if [ "$OS" == "Windows_NT" ]; then
-          # fix up paths to be forward slashes consistently
           BOOST_ROOT=$(echo $BOOST_ROOT | sed 's/\\/\//g')
         fi
         mkdir -p $BOOST_ROOT
@@ -97,6 +96,12 @@ jobs:
         rm -rf boost_*/* download.tar.bz2 download.tar
       shell: bash
 
+    - name: Save Boost cache
+      if: steps.restore-boost.outputs.cache-hit != 'true'
+      uses: actions/cache/save@v4
+      with:
+        path: ${{env.BOOST_ROOT}}
+        key: ${{ steps.restore-boost.outputs.cache-primary-key }}
 
     - name: Use CMake 3.30.3
       uses: lukka/[email protected]
@@ -256,13 +261,13 @@ jobs:
          echo "WITH_3DMAPPER=no" >> $GITHUB_ENV
          echo "WITH_FONTS=no" >> $GITHUB_ENV
 
-    - name: restore ccache
-      uses: actions/cache@v4
+    - name: Restore ccache
+      id: restore-ccache
+      uses: actions/cache/restore@v4
       with:
         path: ${{runner.workspace}}/ccache
         key: ccache-${{matrix.os}}-${{matrix.compiler}}-${{matrix.qt}}-${{ github.sha }}
         restore-keys: ccache-${{matrix.os}}-${{matrix.compiler}}-${{matrix.qt}}
-        save-always: true
 
     - name: (Linux) Set build info
       if: runner.os == 'Linux'
@@ -297,15 +302,20 @@ jobs:
         cmakeListsTxtPath: '${{github.workspace}}/CMakeLists.txt'
         useVcpkgToolchainFile: true
         buildDirectory: '${{runner.workspace}}/b/ninja'
-        # enable for a debug build (1/2)
-        # buildWithCMakeArgs: --config RelWithDebInfo
         cmakeAppendedArgs: >-
           -G Ninja
           -DCMAKE_PREFIX_PATH=${{ env.QT_PREFIX != '' && env.QT_PREFIX || env.MINGW_BASE_DIR }}
           -DVCPKG_APPLOCAL_DEPS=OFF
       env:
         NINJA_STATUS: '[%f/%t %o/sec] '
 
+    - name: Save ccache
+      if: always() && steps.restore-ccache.outputs.cache-hit != 'true'
+      uses: actions/cache/save@v4
+      with:
+        path: ${{runner.workspace}}/ccache
+        key: ${{ steps.restore-ccache.outputs.cache-primary-key }}
+
     - name: Upload GitHub Actions artifact of vcpkg build logs
       if: failure()
       uses: actions/upload-artifact@v4
@@ -321,13 +331,6 @@ jobs:
       working-directory: '${{runner.workspace}}/b/ninja'
       run: ctest --output-on-failure
 
-    - name: restore Luarocks for packaging
-      uses: actions/cache@v4
-      with:
-        path: $HOME/.luarocks
-        key: ccache-${{matrix.os}}-${{matrix.compiler}}-${{hashFiles('.github/workflows/build-mudlet.yml')}}
-        restore-keys: ccache-${{matrix.os}}-${{matrix.compiler}}-
-
     - name: install dependencies for packaging/tests
       if: matrix.deploy == 'deploy' || matrix.run_tests == 'true'
       run: |