Bump the github-actions group with 2 updates

Bumps the github-actions group with 2 updates: [docker/build-push-action](https://github.com/docker/build-push-action) and [actions/upload-artifact](https://github.com/actions/upload-artifact).


Updates `docker/build-push-action` from 6.5.0 to 6.6.1
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@5176d81...16ebe77)

Updates `actions/upload-artifact` from 4.3.5 to 4.3.6
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@89ef406...834a144)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: github-actions
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

.github/workflows/build.yml

@@ -87,7 +87,7 @@ jobs:
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db
 
       - name: Build el${{ matrix.el_version }} repo
-        uses: docker/build-push-action@5176d81f87c23d6fc96624dfdbcd9f3830bbe445
+        uses: docker/build-push-action@16ebe778df0e7752d2cfcbd924afdbbd89c1a755
         with:
           file: Dockerfile.el${{ matrix.el_version }}
           context: .
@@ -144,7 +144,7 @@ jobs:
 
       # upload repo artifact before testing them to troubleshoot failures
       - name: Store repo as artifact
-        uses: actions/upload-artifact@89ef406dd8d7e03cfd12d9e0a4a378f454709029
+        uses: actions/upload-artifact@834a144ee995460fba8ed112a2fc961b36a5ec5a
         with:
           name: spel-repo-el${{ matrix.el_version }}
           path: .repo/el${{ matrix.el_version }}