Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -134,14 +134,14 @@ jobs:
         run: echo "subdir=$(echo ${{matrix.opensuse_version}} | sed 's/leap:/lp/g' | sed 's/\.//g')" > $GITHUB_OUTPUT
       - name: Upload source
         if: matrix.opensuse_version == 'tumbleweed'
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: source
           path: |
             /usr/src/packages/SOURCES/*.xz
       - name: Upload rpm
         if: matrix.opensuse_version != 'tumbleweed'
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: opensuse-${{steps.set-subdir.outputs.subdir}}
           path: |
@@ -234,7 +234,7 @@ jobs:
         working-directory: build
         run: rpmbuild -ba strawberry.spec
       - name: Upload artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: fedora-${{matrix.fedora_version}}
           path: |
@@ -333,7 +333,7 @@ jobs:
         run: rpmbuild -ba strawberry.spec
       - name: Upload artifacts
         if: matrix.openmandriva_version != 'cooker'
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: openmandriva-${{matrix.openmandriva_version}}
           path: |
@@ -434,7 +434,7 @@ jobs:
         working-directory: build
         run: rpmbuild -ba strawberry.spec
       - name: Upload artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: mageia-${{matrix.mageia_version}}
           path: |
@@ -528,7 +528,7 @@ jobs:
       - name: Copy deb
         run: cp ../*.deb .
       - name: Upload artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: debian-${{matrix.debian_version}}
           path: |
@@ -624,7 +624,7 @@ jobs:
       - name: Copy deb
         run: cp ../*.deb ../*.ddeb .
       - name: Upload artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: ubuntu-${{matrix.ubuntu_version}}
           path: |