Bump actions/checkout from 3 to 4 (pmmp#178)

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>

[no release]

Author: dependabot[bot]

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
         pm-version-major: [4, 5]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install tools and dependencies
         run: |
@@ -79,7 +79,7 @@ jobs:
         pm-version-major: [ 4, 5 ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install tools and dependencies
         run: brew install libtool autoconf automake pkg-config bison re2c
@@ -136,7 +136,7 @@ jobs:
         pm-version-major: [ 4, 5 ]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Install tools and dependencies
         run: choco install wget --no-progress
@@ -173,7 +173,7 @@ jobs:
     if: ${{ startsWith(github.ref_name, 'php/') && github.ref_type == 'branch' && !contains(github.event.head_commit.message, '[no release]') }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Set version information
         id: version