chore(deps): bump docker/build-push-action from 6 to 7 (#51)

Author: Scotchester

.github/workflows/publish-devcontainer.yml

@@ -36,7 +36,7 @@ jobs:
         uses: docker/setup-buildx-action@v4
 
       - name: Build, tag, and push image to GHCR [python ${{ matrix.python-version }}]
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         with:
           builder: ${{ steps.buildx.outputs.name }}
           build-args: |