Fix autoscaler version extraction in workflow job

Author: Tereius

.github/workflows/main.yml

@@ -11,9 +11,13 @@ jobs:
       - name: "Clone repository"
         uses: actions/checkout@v4
       - name: "Write version to outputs"
-        run: echo autoscaler_version=$(grep -oP '(?<=autoscaler_version\s?=\s?")[^"]*' version.tf) >> "$GITHUB_OUTPUT"
+        run: |
+          VERSION=$(grep -oP '(?<=autoscaler_version = ")[^"]*' version.tf)
+          if [ -z "${VERSION}" ]; then exit 1; fi
+          echo autoscaler_version=${VERSION} >> "$GITHUB_OUTPUT"
+
   build_docker_image:
-    name: "Build/Push Docker Image"
+    name: "Build/Push autoscaler Image"
     needs: extract_version
     runs-on: ubuntu-latest
     permissions: