Bump actions/checkout from 2 to 4 (#56)

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

.github/workflows/bump-minor.yml

@@ -6,7 +6,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         ssh-key: "${{ secrets.PUSH_TAG_PRIVATE_KEY }}"
 

.github/workflows/bump-patch.yml

@@ -6,7 +6,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         ssh-key: "${{ secrets.PUSH_TAG_PRIVATE_KEY }}"
 

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     if: github.repository == 'go-rel/mysql'
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
           mysql user: rel
           mysql password: rel
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Test
         env:
           MYSQL_DATABASE: rel:rel@(127.0.0.1:3306)/rel_test
@@ -54,7 +54,7 @@ jobs:
         with:
           go-version: 1.21
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Start mysql containers
         run: docker-compose -f "docker-compose.yml" up -d --build
       - name: Test