Use spring-gradle-build-action@v2

We also need to use -Porg.gradle.java.installations.auto-detect=false so some of
the Gradle versions don't get xerces ClassCastExceptions.

Closes gh-12568

.github/workflows/deploy-docs.yml

@@ -21,7 +21,7 @@ jobs:
       with:
         fetch-depth: 5
     - name: Set Up Gradle
-      uses: spring-io/spring-gradle-build-action@v1
+      uses: spring-io/spring-gradle-build-action@v2
       with:
         java-version: '17'
         distribution: temurin