Update docker/build-push-action action to v5 (#97)

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

.github/workflows/build.yml

@@ -108,7 +108,7 @@ jobs:
           unzip KeyConnector.zip -d src/KeyConnector/obj/build-output/publish
 
       - name: Build Docker image
-        uses: docker/build-push-action@1104d471370f9806843c095c1db02b5a90c5f8b6 # v3.3.1
+        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
         with:
           context: src/KeyConnector
           file: src/KeyConnector/Dockerfile