Bump actions/checkout from 3 to 4 (#567)

Author: Widcket

.github/workflows/build-and-test.yml

@@ -10,7 +10,7 @@ jobs:
   gradle:
     runs-on:  ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-java@v3
         with:
           distribution: temurin

.github/workflows/gradle-wrapper-validation.yml

@@ -6,5 +6,5 @@ jobs:
     name: "validation/gradlew"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gradle/wrapper-validation-action@56b90f209b02bf6d1deae490e9ef18b21a389cd4 # pin@1.1.0