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

Author: renovate[bot]

.github/workflows/docker.yaml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3

.github/workflows/docs.yaml

@@ -15,7 +15,7 @@ jobs:
       name: github-pages
       url: ${{steps.deployment.outputs.page_url}}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/configure-pages@v5
       - uses: jdx/mise-action@v2
       - name: Build docs

.github/workflows/python.yaml

@@ -11,31 +11,31 @@ jobs:
   fmt-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: jdx/mise-action@v2
       - name: Check formatting
         run: tire fmt --check
 
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: jdx/mise-action@v2
       - name: Linting
         run: tire lint
 
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: jdx/mise-action@v2
       - name: Type checking
         run: tire check
 
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: jdx/mise-action@v2
       - name: Tests
         run: tire test
@@ -51,7 +51,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/') && github.event_name == 'push'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Get tags
         run: git fetch --tags origin