chore(deps): update actions/checkout action to v6 (#519)

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

Author: renovate[bot]

.github/workflows/dependency-review.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout Repository
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd   # v5.0.1
+      uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3   # v6.0.0
       with:
         persist-credentials: false
     - name: Dependency Review

.github/workflows/label-sync.yml

@@ -21,7 +21,7 @@ jobs:
     name: Sync labels
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - uses: srealmoreno/label-sync-action@850ba5cef2b25e56c6c420c4feed0319294682fd # v2.0.0

.github/workflows/pre-commit.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-24.04
 
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - name: Get cache tag

.github/workflows/pull_requests.yaml

@@ -19,7 +19,7 @@ jobs:
     name: Weblate automerge
     if: github.actor == 'weblate'
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - name: Enable Pull Request Automerge

.github/workflows/pythonpackage.yml

@@ -19,7 +19,7 @@ jobs:
         - '3.14'
         - 3.14t
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/setup.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       with:
         persist-credentials: false
@@ -51,7 +51,7 @@ jobs:
   sdist:
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - name: Set up Python
@@ -74,7 +74,7 @@ jobs:
     - build_wheels
     runs-on: ubuntu-24.04
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         persist-credentials: false
     - name: Set up Python