Bump actions/checkout from 5 to 6 (#386)

* Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/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
...

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

* dummy

* dummy

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: odunbar <odunbar@caltech.edu>

Author: dependabot[bot]

.github/workflows/Docs.yml

@@ -19,7 +19,7 @@ jobs:
         uses: styfle/cancel-workflow-action@0.12.1
         with:
           access_token: ${{ github.token }}
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v2
         with:
           version: "1.11"

.github/workflows/JuliaFormatter.yml

@@ -19,7 +19,7 @@ jobs:
       with:
         access_token: ${{ github.token }}
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     - uses: dorny/paths-filter@v3.0.2
       id: filter