Bump actions/checkout from 2 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...v4)

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

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

.github/workflows/a11y.yml

@@ -10,7 +10,7 @@ jobs:
   a11y:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'

.github/workflows/chromatic.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/deployment.yml

@@ -11,7 +11,7 @@ jobs:
     name: "Deploy release"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
@@ -44,7 +44,7 @@ jobs:
     name: "Deploy NPM package"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'

.github/workflows/gh-pages.yml

@@ -9,7 +9,7 @@ jobs:
   github-pages:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Setup Node
         uses: actions/setup-node@v3

.github/workflows/lint.yml

@@ -10,7 +10,7 @@ jobs:
   css_stylelint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
@@ -22,7 +22,7 @@ jobs:
   js_eslint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
@@ -34,7 +34,7 @@ jobs:
   css_prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
@@ -47,7 +47,7 @@ jobs:
   js_prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v3
         with:
           node-version-file: '.nvmrc'
@@ -62,7 +62,7 @@ jobs:
     if: '!github.event.deleted'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup Node
         uses: actions/setup-node@v3
         with: