Update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/CI.yml

@@ -31,7 +31,7 @@ jobs:
         shell: bash
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v6

.github/workflows/labeler.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run Labeler
         uses: crazy-max/ghaction-github-labeler@v5

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0