Update Antora

- Use org.gradle 1.0.0
- Need to use JDK 17 for latest plugin
- Use io.spring.antora.generate-antora-yml
- Use collector extension
- Use name: session

Closes gh-2327

.github/workflows/continuous-integration-workflow.yml

@@ -20,7 +20,7 @@ jobs:
     if: github.repository == 'spring-projects/spring-session'
     strategy:
       matrix:
-        jdk: [8, 11]
+        jdk: [17]
       fail-fast: false
     steps:
       - uses: actions/checkout@v2
@@ -53,7 +53,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: '8'
+          java-version: '17'
       - name: Setup gradle user name
         run: |
           mkdir -p ~/.gradle