upgrade monthly deps check github actions/[checkout,cache]@v4

.github/workflows/monthly-deps-check.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Cache maven dependencies
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       env:
         cache-name: cache-maven-deps
       with:
@@ -34,10 +34,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Cache maven dependencies
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       env:
         cache-name: cache-maven-deps
       with: