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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     name: Check for required changelogs
     if: ${{ !contains(github.event.head_commit.author, 'renovate') }}
     steps:
-    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
       with:
         fetch-depth: 0   # fetch all history
 
@@ -50,7 +50,7 @@ jobs:
         - 5432:5432
 
     steps:
-    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
       with:
         fetch-depth: 0   # fetch all history
 
@@ -84,7 +84,7 @@ jobs:
     runs-on: ubuntu-24.04
     if: startsWith(github.ref, 'refs/tags/')
     steps:
-    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
 
     - name: Install uv
       uses: astral-sh/setup-uv@5a7eac68fb9809dea845d802897dc5c723910fa3 # v7

.github/workflows/renovate.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
     - name: Apt install
       run: sudo apt-get update && sudo apt-get install -y libxmlsec1-dev