build(deps): bump actions/upload-artifact from 4.4.0 to 4.4.3

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4.4.0 to 4.4.3.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@5076954...b4b15b8)

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

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

.github/workflows/buildx.yml

@@ -79,7 +79,7 @@ jobs:
           touch "/tmp/digests/${digest#sha256:}"
       -
         name: Upload digest
-        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 #v4.4.0
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 #v4.4.3
         with:
           name: digests-${{ env.PLATFORM_PAIR }}
           path: /tmp/digests/*