Bump actions/checkout from 3 to 3.0.2

Author: Gary Gregory

.github/workflows/maven.yml

@@ -43,7 +43,7 @@ jobs:
       fail-fast: false
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v3.0.2
     - uses: actions/cache@v3.0.8
       with:
         path: ~/.m2/repository