ci: migrate to actions/checkout@v4

Co-authored-by: Palm <[email protected]>

.github/workflows/build.yml

@@ -9,8 +9,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Checkout builds
+        uses: actions/checkout@v4
         with:
           repository: "revenge-mod/builds"
           path: "builds"