ci(deps): bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/security.yml

@@ -14,7 +14,7 @@ jobs:
     name: Cargo Audit
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: rustsec/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -23,7 +23,7 @@ jobs:
     name: Cargo Deny
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: EmbarkStudios/cargo-deny-action@v2
         with:
           log-level: warn
@@ -34,7 +34,7 @@ jobs:
     name: Security Tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: dtolnay/rust-toolchain@stable
       - name: Run IPL parser fuzz tests
         run: cargo test --package infera-core --test ipl_parser_fuzz