Bump actions/checkout from 1 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/agenda.yaml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1 # checkout repo content
+    - uses: actions/checkout@v4 # checkout repo content
 
     - name: Create agenda issue
       run: gh issue create -l Housekeeping -t "Open Community (TDC) Meeting, `date --date='next Thu' +'%A %d %B %Y'`" -F .github/templates/agenda.md

.github/workflows/convert-examples-to-json.yaml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2 # checkout repo content
+    - uses: actions/checkout@v4 # checkout repo content
 
     - name: Install dependencies
       run: npm i

.github/workflows/respec.yaml

@@ -21,14 +21,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2 # checkout main branch
+    - uses: actions/checkout@v4 # checkout main branch
       with:
         fetch-depth: 0
 
     - name: Install dependencies
       run: npm i
 
-    - uses: actions/checkout@v2 # checkout gh-pages branch
+    - uses: actions/checkout@v4 # checkout gh-pages branch
       with:
         ref: gh-pages
         path: deploy

.github/workflows/schema-tests.yaml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1 # checkout repo content
+    - uses: actions/checkout@v4 # checkout repo content
     - uses: actions/setup-node@v1 # setup Node.js
       with:
         node-version: '14.x'

.github/workflows/validate-markdown.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2 # checkout repo content
+    - uses: actions/checkout@v4 # checkout repo content
     - uses: actions/setup-node@v1 # setup Node.js
       with:
         node-version: '14.x'