Bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/deploy.yaml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0  # fetch the entire repo history, required to guarantee setuptools_scm will pick up tags
       - uses: actions/setup-python@v6

.github/workflows/tests.yaml

@@ -8,7 +8,7 @@ jobs:
     name: Run sphinx-build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0  # fetch the entire repo history, required to guarantee versioneer will pick up the tags
       - uses: astral-sh/setup-uv@v7
@@ -29,7 +29,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0  # fetch the entire repo history, required to guarantee versioneer will pick up the tags
     - uses: astral-sh/setup-uv@v7
@@ -48,7 +48,7 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0  # fetch the entire repo history, required to guarantee versioneer will pick up the tags
     - uses: astral-sh/setup-uv@v7