chore(ci): bump actions/cache from 4 to 5 (#26)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -114,7 +114,7 @@ jobs:
       - name: Restore tool cache
         if: env.DISABLE_TOOL_CACHE != 'true'
         id: staticcheck-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.TOOLS_BIN }}
           key: staticcheck-${{ runner.os }}-${{ env.GOTOOLCHAIN }}-${{ env.STATICCHECK_VERSION }}
@@ -224,7 +224,7 @@ jobs:
       - name: Restore tool cache
         if: env.DISABLE_TOOL_CACHE != 'true'
         id: gosec-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.TOOLS_BIN }}
           key: gosec-${{ runner.os }}-${{ env.GOTOOLCHAIN }}-${{ env.GOSEC_VERSION }}
@@ -261,7 +261,7 @@ jobs:
       - name: Restore tool cache
         if: env.DISABLE_TOOL_CACHE != 'true'
         id: govulncheck-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.TOOLS_BIN }}
           key: govulncheck-${{ runner.os }}-${{ env.GOTOOLCHAIN }}-${{ env.GOVULNCHECK_VERSION }}