build(deps): bump actions/checkout from 5 to 6 in the actions group

Bumps the actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -80,7 +80,7 @@ jobs:
           browser: chromium
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -127,7 +127,7 @@ jobs:
           browser-channel: msedge
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -163,7 +163,7 @@ jobs:
         os: [ubuntu-22.04, macos-13, windows-2022]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Get conda
@@ -184,7 +184,7 @@ jobs:
       run:
         working-directory: examples/todomvc/
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:

.github/workflows/publish.yml

@@ -25,7 +25,7 @@ jobs:
         # Required for conda-incubator/setup-miniconda@v3
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Get conda

.github/workflows/publish_docker.yml

@@ -15,7 +15,7 @@ jobs:
       contents: read    # This is required for actions/checkout to succeed
     environment: Docker
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Azure login
       uses: azure/login@v2
       with:

.github/workflows/test_docker.yml

@@ -30,7 +30,7 @@ jobs:
           - ubuntu-24.04
           - ubuntu-24.04-arm
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with: