ci: enable updateDocs PR check (#2488)

* ci: enable updateDocs PR check

* deps: revert to spring-cloud-build 4.0.5 to fix docs generation

* ci: simplify updateDocs PR check to avoid git branch checkouts

.github/workflows/updateDocs.yaml

@@ -1,6 +1,7 @@
 name: Update Docs
 
 on:
+  pull_request:
   push:
     branches:
     - main
@@ -62,5 +63,5 @@ jobs:
         elif [[ -n "${{ github.event.inputs.committish }}" ]] && [[ "${{ github.event.inputs.committish }}" != "main" ]] ; then
             ./docs/src/main/asciidoc/ghpages.sh --version ${{ github.event.inputs.committish }} --destination . --build
         else
-          ./docs/src/main/asciidoc/ghpages.sh --build
+          ./mvnw install -P docs -P '!CI' -pl docs -DskipTests # Simplified PR check
         fi

docs/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.cloud</groupId>
 		<artifactId>spring-cloud-build</artifactId>
-		<version>4.1.0</version>
+		<version>4.0.5</version>
 		<relativePath/>
 	</parent>
 	<modelVersion>4.0.0</modelVersion>