chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/hotpath-comment.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Download profiling results
         uses: actions/download-artifact@v4

.github/workflows/hotpath-profile.yml

@@ -13,7 +13,7 @@ jobs:
     
     steps:
       - name: Checkout PR HEAD
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       

.github/workflows/rust.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
     - name: "Checkout"
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: "Setup Rust toolchain"
       uses: actions-rust-lang/setup-rust-toolchain@v1