build(deps): 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>

.github/workflows/rust.yml

@@ -37,7 +37,7 @@ jobs:
           - s390x
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up environment
         run: .github/workflows/env-setup
         shell: bash
@@ -85,7 +85,7 @@ jobs:
           - s390x
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Detect crate MSRV
         shell: bash
         run: |
@@ -142,7 +142,7 @@ jobs:
           - s390x
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up environment
         run: .github/workflows/env-setup
         shell: bash
@@ -189,7 +189,7 @@ jobs:
           - x86_64
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up environment
         run: .github/workflows/env-setup
         shell: bash
@@ -230,7 +230,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up environment
         run: .github/workflows/env-setup
         shell: bash