Bump actions/cache from 4 to 5

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

---
updated-dependencies:
- dependency-name: actions/cache
  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/ci.yml

@@ -20,7 +20,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/registry
@@ -57,7 +57,7 @@ jobs:
           components: clippy
 
       - name: Cache dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/registry
@@ -78,7 +78,7 @@ jobs:
         uses: dtolnay/rust-toolchain@stable
 
       - name: Cache cargo tools
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cargo/bin
           key: ${{ runner.os }}-cargo-tools-${{ hashFiles('**/Cargo.lock') }}