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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
@@ -85,7 +85,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
@@ -111,7 +111,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: mamba-org/setup-micromamba@v2
         with:
           environment-file: environment.yml
@@ -141,7 +141,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       # The macos-14 runner doesn't come equipped with Python, so we need to install it
       # there.
       - uses: actions/setup-python@v6
@@ -185,7 +185,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: ./tools/extract_version.sh
       - uses: actions/download-artifact@v6
         with:
@@ -217,7 +217,7 @@ jobs:
       run:
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: ./tools/extract_version.sh
       - uses: actions/download-artifact@v6
         with:

.github/workflows/outdated.yml

@@ -14,7 +14,7 @@ jobs:
   deps:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"