Update outdated GitHub Workflow

Author: Noaaan

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: validate gradle wrapper
         uses: gradle/wrapper-validation-action@v1
@@ -39,7 +39,7 @@ jobs:
       - name: capture build artifacts
         # Only capture artifacts from one OS (Linux)
         if: ${{ runner.os == 'Linux' && matrix.java == '21' }} # Only upload artifacts built from latest java on one OS
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: Artifacts
           path: build/libs/