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] <[email protected]>

.github/workflows/CI.yml

@@ -77,7 +77,7 @@ jobs:
             destination: "OS=16.0,name=iPhone 14"
             name: "iOS"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: set -o pipefail && env NSUnbufferedIO=YES xcodebuild -project GRDB.xcodeproj -scheme GRDB -destination "${{ matrix.destination }}" OTHER_SWIFT_FLAGS='$(inherited) -D SQLITE_ENABLE_FTS5 -D SQLITE_ENABLE_PREUPDATE_HOOK' GCC_PREPROCESSOR_DEFINITIONS='$(inherited) GRDB_SQLITE_ENABLE_PREUPDATE_HOOK=1' clean test
   SPM:
@@ -103,7 +103,7 @@ jobs:
             runsOn: macOS-12
             name: "Xcode 14.0.1"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: make test_SPM test_install_SPM
   SQLCipher3:
@@ -123,7 +123,7 @@ jobs:
             runsOn: macOS-12
             name: "Xcode 14.0.1"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: make test_framework_SQLCipher3Encrypted
   SQLCipher4:
@@ -143,7 +143,7 @@ jobs:
             runsOn: macOS-12
             name: "Xcode 14.0.1"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: make test_framework_SQLCipher4Encrypted
   CustomSQLite:
@@ -163,7 +163,7 @@ jobs:
             runsOn: macOS-12
             name: "Xcode 14.0.1"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: make test_framework_GRDBCustomSQLiteOSX
   XCFramework:
@@ -183,7 +183,7 @@ jobs:
             runsOn: macOS-12
             name: "Xcode 14.0.1"
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ${{ matrix.name }}
         run: make test_universal_xcframework