Bump actions/checkout from 3.0.2 to 4.1.2

Bumps [actions/checkout](https://github.com/actions/checkout) from 3.0.2 to 4.1.2.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@2541b12...9bb5618)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/rust.yml

@@ -24,7 +24,7 @@ jobs:
     timeout-minutes: 5
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+    - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
     - uses: EmbarkStudios/cargo-deny-action@b655a95dbfd6f1dacd48f7e869cb37cf4f03a6d9
       with:
         command: check bans licenses sources
@@ -35,7 +35,7 @@ jobs:
     runs-on: ubuntu-latest
     container: docker://ghcr.io/linkerd/dev:v43-rust
     steps:
-      - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
       - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84
       - run: cargo fetch
       - run: cargo clippy --all-targets
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     container: docker://ghcr.io/linkerd/dev:v43-rust
     steps:
-      - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
       - run: cargo fmt -- --check
 
   # Run all tests.
@@ -55,7 +55,7 @@ jobs:
     runs-on: ubuntu-latest
     container: docker://ghcr.io/linkerd/dev:v43-rust
     steps:
-      - uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
+      - uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633
       - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84
       - run: cargo fetch
       - run: cargo test