build(deps): bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -80,7 +80,7 @@ jobs:
           mv "${{ steps.meta.outputs.bake-file }}" "/tmp/bake-meta.json"
       -
         name: Upload meta bake definition
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: bake-meta-${{ matrix.variant }}
           path: /tmp/bake-meta.json
@@ -165,7 +165,7 @@ jobs:
           touch "/tmp/digests/${digest#sha256:}"
       -
         name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: digests-${{ matrix.variant }}-${{ env.PLATFORM_PAIR }}
           path: /tmp/digests/*