chore(deps): update actions/checkout action to v6 (#152)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/codeql-analysis.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4

.github/workflows/continuous-integration.yml

@@ -31,7 +31,7 @@ jobs:
           - vue-vite-ts
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Use Node.js v20
         uses: actions/setup-node@v6
         with:

.github/workflows/labelsync.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           sparse-checkout: .github/labels.yml
           sparse-checkout-cone-mode: false