Cache downloaded IDEs used by Plugin Verifier for the verification

Author: hsz

.github/workflows/build.yml

@@ -169,7 +169,7 @@ jobs:
           path: ~/.gradle/wrapper
           key: ${{ runner.os }}-gradle-wrapper-${{ hashFiles('**/gradle/wrapper/gradle-wrapper.properties') }}
 
-      # Cache Plugin Verifier IDEs xx
+      # Cache Plugin Verifier IDEs
       - name: Setup Plugin Verifier IDEs Cache
         uses: actions/cache@v2
         with: