Update CI to use JDK 17

Author: dturner

.github/workflows/blueprints.yaml

@@ -22,10 +22,10 @@ jobs:
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
-      - name: Set up JDK 11
+      - name: Set up JDK 17
         uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 17
 
       - uses: actions/cache@v2
         with: