Bump actions/checkout from 4 to 6 (#7526)

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

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

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

@@ -63,7 +63,7 @@ jobs:
           echo "LC_ALL=lv_LV.utf8" >> $GITHUB_ENV
           echo "LANGUAGE=lv_LV" >> $GITHUB_ENV
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-r@v2
         with:

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

@@ -40,7 +40,7 @@ jobs:
       _R_CHECK_RD_CHECKRD_MINLEVEL_: -Inf
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-r@v2
         with:

.github/workflows/code-quality.yaml

@@ -16,7 +16,7 @@ jobs:
       md: ${{ steps.filter.outputs.md }}
       rd: ${{ steps.filter.outputs.rd }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # ensure diff against base is available for PRs
       - uses: dorny/paths-filter@v3
@@ -44,7 +44,7 @@ jobs:
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-r@v2
         with:
@@ -68,7 +68,7 @@ jobs:
     if: needs.changes.outputs.c == 'true' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-r@v2
       - name: Install Coccinelle
         # relying on the action above us to have updated the package cache
@@ -81,7 +81,7 @@ jobs:
     if: needs.changes.outputs.po == 'true' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-r@v2
       - name: Check translations
         # only pay attention to files edited in the current PR, otherwise we can get
@@ -96,7 +96,7 @@ jobs:
     if: needs.changes.outputs.md == 'true' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-r@v2
       - name: Lint
         run: Rscript .ci/lint.R .ci/linters/md . '[.]R?md$'
@@ -105,7 +105,7 @@ jobs:
     if: needs.changes.outputs.rd == 'true' || github.event_name == 'workflow_dispatch'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-r@v2
       - name: Lint Rd files
         run: Rscript .ci/lint.R .ci/linters/rd man '[.]Rd$'

.github/workflows/cran-status-check.yaml

@@ -13,7 +13,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-r@v2
         with:

.github/workflows/pkgup.yaml

@@ -22,7 +22,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-pandoc@v2
       - uses: r-lib/actions/setup-r@v2
       - name: cache-r-dependencies

.github/workflows/rchk.yaml

@@ -33,7 +33,7 @@ jobs:
   rchk:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: r-lib/actions/setup-r@v2
         with:
             r-version: 'devel'

.github/workflows/test-coverage.yaml

@@ -29,7 +29,7 @@ jobs:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: r-lib/actions/setup-r@v2
         with: