Update mvntest.yml

Author: wnm3

.github/workflows/mvntest.yml

@@ -7,9 +7,9 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v3
       - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v3
         with:
           java-version: '17'
           distribution: 'temurin'