Update docker/build-push-action action to v3 (#6)

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

Author: renovate[bot]

action.yml

@@ -103,7 +103,7 @@ runs:
         password: ${{ inputs.password }}
 
     - name: Build and push Docker images
-      uses: docker/build-push-action@v2
+      uses: docker/build-push-action@v3
       with:
         context: ${{ inputs.workdir }}
         file: ${{ inputs.workdir }}/${{ inputs.file }}