Use actions/checkout@v4

README.md

@@ -16,7 +16,7 @@ You can find the image on [Docker Hub](https://hub.docker.com/r/botsudo/action-d
 ## Example usage for 5.x series
 
 ```yml
-  - uses: actions/checkout@v3
+  - uses: actions/checkout@v4
   - name: build doctum docs
     uses: sudo-bot/action-doctum@v5
     with:
@@ -30,7 +30,7 @@ You can find the image on [Docker Hub](https://hub.docker.com/r/botsudo/action-d
 ## Example usage for latest series
 
 ```yml
-  - uses: actions/checkout@v3
+  - uses: actions/checkout@v4
   - name: build doctum docs
     uses: sudo-bot/action-doctum@latest
     with:
@@ -44,7 +44,7 @@ You can find the image on [Docker Hub](https://hub.docker.com/r/botsudo/action-d
 ## Example usage for dev series
 
 ```yml
-  - uses: actions/checkout@v3
+  - uses: actions/checkout@v4
   - name: build doctum docs
     uses: sudo-bot/action-doctum@dev
     with:
@@ -67,7 +67,7 @@ jobs:
     name: lint-phpdoc
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Create a config file
         # Scan all the src folder
         run: echo "<?php return new Doctum\Doctum('src/');" > doctum-config.php