Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -103,7 +103,7 @@ jobs:
           fetch-depth: 0
 
       - name: Download generated PDFs
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: 'pdfs'
           path: packaging
@@ -275,12 +275,12 @@ jobs:
     needs: build
 
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: 'macOS_Latest_Clang_x64'
           path: 'macOS_Latest_Clang_x64'
 
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v4.1.7
         with:
           name: 'macOS_Latest_Clang_arm64'
           path: 'macOS_Latest_Clang_arm64'