build(deps): bump actions/checkout from 3 to 4 (#71)

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

.github/workflows/nightlies.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout nightlies
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: nightlies
 
@@ -160,7 +160,7 @@ jobs:
     env: ${{ matrix.setting.environment }}
     steps:
       - name: Checkout nightlies
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: nightlies
 
@@ -173,7 +173,7 @@ jobs:
 
       - name: Checkout Nim
         if: steps.nim-cache.outputs.cache-hit != 'true'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: nim-lang/Nim
           ref: ${{ matrix.setting.commit }}
@@ -213,7 +213,7 @@ jobs:
         if: >
           steps.nim-cache.outputs.cache-hit != 'true' &&
           steps.csources-cache.outputs.cache-hit != 'true'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: ${{ steps.csources-version.outputs.repo }}
           ref: ${{ steps.csources-version.outputs.commit }}
@@ -342,7 +342,7 @@ jobs:
     runs-on: ${{ matrix.builder }}
     steps:
       - name: Checkout build scripts
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: nightlies
 
@@ -464,7 +464,7 @@ jobs:
 
       - name: Checkout nightlies
         if: steps.deploy-cache.outputs.cache-hit != 'true'
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           path: nightlies