ci: 归位 2.0.x 工作流——JDK 17（此前误写为 JDK 8）

Author: loong10k

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ permissions:
 
 jobs:
   build:
-    name: JDK 8 Build & Verify
+    name: JDK 17 Build & Verify
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
@@ -32,7 +32,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: '8'
+          java-version: '17'
           cache: maven
 
       - name: Build and verify with JaCoCo coverage gate