chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/pr_checks.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup node
         uses: actions/setup-node@v4
         with:
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup node
         uses: actions/setup-node@v4
         with:
@@ -41,7 +41,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup node
         uses: actions/setup-node@v4
         with: