Bump actions/upload-artifact from 4 to 5 (#23)

Author: dependabot[bot]

.github/workflows/qt5_6.yml

@@ -109,7 +109,7 @@ jobs:
           touch "/tmp/digests/${digest#sha256:}"
 
       - name: 📦 Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: ${{ inputs.distribution }}-${{ inputs.codename }}-qt${{ inputs.qt_version }}-${{ matrix.target_platform }}
           path: /tmp/digests/*