👷 Update actions/checkout GitHub Action to Version v6

Signed-off-by: pcaversaccio <pascal.caversaccio@hotmail.ch>

Author: pcaversaccio

.github/workflows/checks.yml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js ${{ matrix.node_version }}
         uses: actions/setup-node@v6
@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1