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/audit.yaml

@@ -22,5 +22,5 @@ jobs:
       # Allow the action to post about found problems
       issues: write
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions-rust-lang/audit@v1

.github/workflows/ci.yaml

@@ -22,7 +22,7 @@ jobs:
         rust: ["stable", "nightly"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install/Update the Rust version"
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
@@ -44,7 +44,7 @@ jobs:
         rust:
           - stable
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install/Update the Rust version"
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
@@ -64,7 +64,7 @@ jobs:
         rust: ["1.64", "1.65", "1.70", "stable", "beta", "nightly"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install/Update the Rust version"
         uses: actions-rust-lang/setup-rust-toolchain@v1
         with:

.github/workflows/publish-crates-io.yaml

@@ -14,7 +14,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install/Update the Rust version"
         run: |
           rustup toolchain install stable --profile minimal

.github/workflows/scorecards-analysis.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           persist-credentials: false