chore: bump the actions group with 2 updates (#33)

Bumps the actions group with 2 updates: [actions/checkout](https://github.com/actions/checkout) and [JamesIves/github-pages-deploy-action](https://github.com/jamesives/github-pages-deploy-action).


Updates `actions/checkout` from 4 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

Updates `JamesIves/github-pages-deploy-action` from 4.7.3 to 4.7.4
- [Release notes](https://github.com/jamesives/github-pages-deploy-action/releases)
- [Commits](JamesIves/github-pages-deploy-action@v4.7.3...v4.7.4)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: JamesIves/github-pages-deploy-action
  dependency-version: 4.7.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/R-CMD-check.yaml

@@ -24,7 +24,7 @@ jobs:
       MPLBACKEND: Agg
     steps:
       - name: Checkout ACRO
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup Python
         uses: actions/setup-python@v6
         with:

.github/workflows/pkgdown.yaml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6
@@ -46,7 +46,7 @@ jobs:
 
       - name: Deploy to GitHub pages
         if: github.event_name != 'pull_request'
-        uses: JamesIves/github-pages-deploy-action@v4.7.3
+        uses: JamesIves/github-pages-deploy-action@v4.7.4
         with:
           clean: false
           branch: gh-pages

.github/workflows/test-coverage.yaml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout ACRO
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Python
         uses: actions/setup-python@v6