Bump actions/checkout from 5.0.1 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@93cb6ef...1af3b93)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -24,7 +24,7 @@ jobs:
           egress-policy: audit
 
       - name: "Checkout repository"
-        uses: "actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd"
+        uses: "actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3"
 
       - name: "Setup Python"
         uses: "actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c"

.github/workflows/tox.yml

@@ -23,7 +23,7 @@ jobs:
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           persist-credentials: false
       - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
@@ -39,7 +39,7 @@ jobs:
         job: [pep8, release-check]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           persist-credentials: false
       - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0