Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https:/actions/checkout) from 3 to 4.
- [Release notes](https:/actions/checkout/releases)
- [Changelog](https:/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/rust.yml

@@ -13,7 +13,7 @@ jobs:
 
  steps:
  - name: Checkout sources
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
 
  - name: Install Rust toolchain
  uses: actions-rs/[email protected]
@@ -81,7 +81,7 @@ jobs:
 
  steps:
  - name: Checkout sources
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
 
  - name: Install Rust toolchain
  uses: actions-rs/[email protected]
@@ -134,7 +134,7 @@ jobs:
 
  steps:
  - name: Checkout sources
- uses: actions/checkout@v3
+ uses: actions/checkout@v4
 
  - name: Install Rust toolchain
  uses: actions-rs/[email protected]