fix(build): downgrade to JDK 16

Author: Cubxity

.github/workflows/preview.yml

@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: Set up JDK 17
+      - name: Set up JDK 16
         uses: actions/setup-java@v2
         with:
-          java-version: 17
+          java-version: 16
           distribution: adopt
           cache: "gradle"
       - name: Grant execute permission for gradlew

.github/workflows/release.yml

@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: Set up JDK 17
+      - name: Set up JDK 16
         uses: actions/setup-java@v2
         with:
-          java-version: 17
+          java-version: 16
           distribution: adopt
           cache: "gradle"
       - name: Grant execute permission for gradlew