Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/ci-check.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       # ...
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v2
         with:

.github/workflows/detekt-analysis.yml

@@ -38,7 +38,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     # Gets the download URL associated with the $DETEKT_RELEASE_TAG
     - name: Get Detekt download URL

.github/workflows/prerelease.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       # ...
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v2
         with: