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

Author: github-actions[bot]

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: [idp]
     environment: ci
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/publish.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: [idp]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0