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>

Author: dependabot[bot]

.github/workflows/coreaudio-rs.yml

@@ -5,7 +5,7 @@ jobs:
   macos-test:
     runs-on: macOS-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install llvm and clang
       run: brew install llvm
     - name: Install stable
@@ -25,15 +25,15 @@ jobs:
   security-audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: rustsec/audit-check@v1.4.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
 
   ios-build:
     runs-on: macOS-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install llvm and clang
       run: brew install llvm
     - name: Install stable
@@ -53,7 +53,7 @@ jobs:
   macos-docs:
     runs-on: macOS-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install llvm and clang
       run: brew install llvm
     - name: Install stable
@@ -73,7 +73,7 @@ jobs:
       CRATESIO_TOKEN: ${{ secrets.CRATESIO_TOKEN }}
     runs-on: macOS-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Install llvm and clang
       run: brew install llvm
     - name: Install stable