Force the GHA runners to use Java 8

Author: a-maurice

.github/workflows/build_macos.yaml

@@ -55,6 +55,10 @@ jobs:
         shell: bash
         run: echo "UNITY_EXE=${{ env.UNITY_ROOT_DIR }}/Unity.app/Contents/MacOS/Unity" >> $GITHUB_ENV
 
+      - name: Force Java 8
+        shell: bash
+        run: echo "JAVA_HOME=${JAVA_HOME_8_X64}" >> $GITHUB_ENV
+
       # Build .unitypackage
       - run: ./gradlew buildPlugin --info
 

.github/workflows/test.yaml

@@ -128,6 +128,10 @@ jobs:
         shell: bash
         run: echo "UNITY_EXE=${{ env.UNITY_ROOT_DIR }}/Unity.app/Contents/MacOS/Unity" >> $GITHUB_ENV
 
+      - name: Force Java 8
+        shell: bash
+        run: echo "JAVA_HOME=${JAVA_HOME_8_X64}" >> $GITHUB_ENV
+
       - name: Run tests
         shell: bash
         timeout-minutes: 60