Update snapshot.yml

Author: shuzijun

.github/workflows/snapshot.yml

@@ -16,10 +16,10 @@ jobs:
     - name: Set LD_VERSION
       run: echo "LD_VERSION=0.0" >> $GITHUB_ENV
 
-    - name: Set up JDK 1.8
+    - name: Set up JDK 11
       uses: actions/setup-java@v1
       with:
-        java-version: 1.8
+        java-version: 11
 
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew