Bump actions/checkout from 2 to 4 in /.github/workflows (#132)

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

.github/workflows/check-arduino.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Arduino Lint
         uses: arduino/arduino-lint-action@v1

.github/workflows/compile-examples.yml

@@ -172,7 +172,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Compile examples
         uses: arduino/compile-sketches@v1

.github/workflows/update-libraries.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout filter-repo tool repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: newren/git-filter-repo
           ref: v2.33.0  # See: https://github.com/newren/git-filter-repo/releases
@@ -40,7 +40,7 @@ jobs:
           echo "$INSTALL_PATH" >> "$GITHUB_PATH"
 
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           token: ${{ secrets.LIBRARY_REPO_TOKEN }}
           fetch-depth: 0