Update github actions version

Author: NotStirred

.github/workflows/gradleBuild.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.gradle/caches
@@ -43,4 +43,4 @@ jobs:
         uses: actions/upload-artifact@v2
         with:
           name: Compiled Jars
-          path: build/libs/*
+          path: build/libs/*