Update docker/build-push-action action to v4.2.1 (#52)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/actions/build-image/action.yml

@@ -33,7 +33,7 @@ runs:
       uses: ./.github/actions/get-idris-sha
 
     - name: Build Image
-      uses: docker/build-push-action@v4.1.1
+      uses: docker/build-push-action@v4.2.1
       with:
         context: .
         file: ${{ inputs.dockerfile }}.Dockerfile

.github/actions/deploy-image/action.yml

@@ -62,7 +62,7 @@ runs:
         images: ghcr.io/${{ inputs.image-name }}
 
     - name: Build and push
-      uses: docker/build-push-action@v4.1.1
+      uses: docker/build-push-action@v4.2.1
       with:
         context: .
         platforms: linux/arm64,linux/amd64