Bump actions/checkout from 3 to 4 (#1398)

* Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...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>

* Update fmt-check.yml

* Update .github/workflows/check-licenses.yml

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Update .github/workflows/check-markdown.yml

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

* Update .github/workflows/fmt-check.yml

Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sergejs Kostjucenko <85877331+sergejparity@users.noreply.github.com>
Co-authored-by: Chevdor <chevdor@users.noreply.github.com>

.github/workflows/check-licenses.yml

@@ -14,7 +14,7 @@ jobs:
       NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       - uses: actions/setup-node@v3.8.1
         with:
           node-version: "18.x"

.github/workflows/check-markdown.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout sources
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - uses: actions/setup-node@v3.8.1
         with:

.github/workflows/fmt-check.yml

@@ -16,7 +16,7 @@ jobs:
     container:
       image: paritytech/ci-unified:bullseye-1.70.0-2023-05-23-v20230706
     steps:
-      - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Cargo fmt
         run: cargo +nightly fmt --all -- --check