workflows: bump crazy-max/ghaction-import-gpg from 5 to 6

Bumps [crazy-max/ghaction-import-gpg](https://github.com/crazy-max/ghaction-import-gpg) from 5 to 6.
- [Release notes](https://github.com/crazy-max/ghaction-import-gpg/releases)
- [Commits](crazy-max/ghaction-import-gpg@v5...v6)

---
updated-dependencies:
- dependency-name: crazy-max/ghaction-import-gpg
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/call-build-linux-packages.yaml

@@ -228,7 +228,7 @@ jobs:
 
       - name: Import GPG key for signing
         id: import_gpg
-        uses: crazy-max/ghaction-import-gpg@v5
+        uses: crazy-max/ghaction-import-gpg@v6
         with:
           gpg_private_key: ${{ secrets.gpg_private_key }}
           passphrase: ${{ secrets.gpg_private_key_passphrase }}

.github/workflows/staging-release.yaml

@@ -129,7 +129,7 @@ jobs:
 
     - name: Import GPG key for signing
       id: import_gpg
-      uses: crazy-max/ghaction-import-gpg@v5
+      uses: crazy-max/ghaction-import-gpg@v6
       with:
         gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
         passphrase: ${{ secrets.GPG_PRIVATE_KEY_PASSPHRASE }}
@@ -218,7 +218,7 @@ jobs:
 
     - name: Import GPG key for signing
       id: import_gpg
-      uses: crazy-max/ghaction-import-gpg@v5
+      uses: crazy-max/ghaction-import-gpg@v6
       with:
         gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
         passphrase: ${{ secrets.GPG_PRIVATE_KEY_PASSPHRASE }}
@@ -305,7 +305,7 @@ jobs:
     steps:
     - name: Import GPG key for signing
       id: import_gpg
-      uses: crazy-max/ghaction-import-gpg@v5
+      uses: crazy-max/ghaction-import-gpg@v6
       with:
         gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
         passphrase: ${{ secrets.GPG_PRIVATE_KEY_PASSPHRASE }}