Bump actions/checkout from 4 to 6

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]>

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -54,13 +54,13 @@ jobs:
         run: apt-get update -y
       # See comments beginning at
       # https://github.com/actions/runner/issues/763#issuecomment-1435474884
-      # Without Git, actions/checkout@v4 will resort to REST and will not
+      # Without Git, actions/checkout@v6 will resort to REST and will not
       # create a .git folder or .git.config. The Problem Matcher looks for
       # .git/config to find where the root of the repo is, so it must be
       # present.
       - name: Install Git
         run: apt-get -y install git
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Install build tools

.github/workflows/debian.yml

@@ -25,13 +25,13 @@ jobs:
         run: apt-get update -y
       # See comments beginning at
       # https://github.com/actions/runner/issues/763#issuecomment-1435474884
-      # Without Git, actions/checkout@v4 will resort to REST and will not
+      # Without Git, actions/checkout@v6 will resort to REST and will not
       # create a .git folder or .git.config. The Problem Matcher looks for
       # .git/config to find where the root of the repo is, so it must be
       # present.
       - name: Install Git
         run: apt-get -y install git
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Install build tools
@@ -76,7 +76,7 @@ jobs:
         architecture: [amd64]
     container: debian:${{ matrix.image_tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Download build artifact

.github/workflows/isort.yml

@@ -9,7 +9,7 @@ jobs:
   isort:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - uses: isort/isort-action@v1

.github/workflows/lint.yaml

@@ -14,13 +14,13 @@ jobs:
         run: apt-get update -y
       # See comments beginning at
       # https://github.com/actions/runner/issues/763#issuecomment-1435474884
-      # Without Git, actions/checkout@v4 will resort to REST and will not
+      # Without Git, actions/checkout@v6 will resort to REST and will not
       # create a .git folder or .git.config. The Problem Matcher looks for
       # .git/config to find where the root of the repo is, so it must be
       # present.
       - name: Install Git
         run: apt-get -y install git
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Install build tools
@@ -267,7 +267,7 @@ jobs:
     name: weblint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
       - name: Setup Node.js v18