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](https://github.com/actions/checkout/compare/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/language-test.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Trim comments
         shell: bash
         run: sed -i -e 's/^\s*\/\/.*$//' Telegram/Resources/langs/rewrites/*.json

.github/workflows/tarball-release.yml

@@ -18,7 +18,7 @@ jobs:
           echo "REPO_NAME=${GITHUB_REPOSITORY##*/}-$version-full" >> $GITHUB_ENV
 
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           path: ${{ env.REPO_NAME }}