Align GitHub Actions config more closely with Spring Boot

.github/workflows/build-pull-request.yml

@@ -1,30 +1,24 @@
 name: Build Pull Request
 on: pull_request
-
 permissions:
   contents: read
-
 jobs:
   build:
     name: Build Pull Request
-    runs-on: ubuntu-latest
     if: ${{ github.repository == 'spring-projects/spring-restdocs' }}
+    runs-on: ${{ vars.UBUNTU_MEDIUM || 'ubuntu-latest' }}
     steps:
-      - name: Set Up JDK 17
-        uses: actions/setup-java@b36c23c0d998641eff861008f374ee103c25ac73 # v4.4.0
-        with:
-          java-version: '17'
-          distribution: 'liberica'
-      - name: Check Out
-        uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938 # v4.2.0
-      - name: Set Up Gradle
-        uses: gradle/actions/setup-gradle@d156388eb19639ec20ade50009f3d199ce1e2808 # v4.1.0
+      - name: Check Out Code
+        uses: actions/checkout@v4
       - name: Build
-        env:
-        run: ./gradlew -Dorg.gradle.internal.launcher.welcomeMessageEnabled=false --no-daemon --no-parallel --continue build
+        id: build
+        uses: ./.github/actions/build
+      - name: Print JVM Thread Dumps When Cancelled
+        if: cancelled()
+        uses: ./.github/actions/print-jvm-thread-dumps
       - name: Upload Build Reports
-        uses: actions/upload-artifact@v4
         if: failure()
+        uses: actions/upload-artifact@v4
         with:
           name: build-reports
           path: '**/build/reports/'