Update ci.yaml

Author: tinder-maxwellelliott

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Setup Java JDK
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v1.4.3
         with:
           java-version: 1.8
         id: java