chore(deps): bump actions/cache from 5 to 6

Bumps [actions/cache](https://github.com/actions/cache) from 5 to 6.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/integration_test.yml

@@ -135,7 +135,7 @@ jobs:
           poetry run pip install --force-reinstall --no-deps xllamacpp
 
       - name: Cache llm2 models
-        uses: actions/cache/restore@v5
+        uses: actions/cache/restore@v6
         id: cache-llm2-models-restore
         env:
           cache-name: cache-llm2-models
@@ -178,7 +178,7 @@ jobs:
           [ "$TASK_STATUS" == '"STATUS_SUCCESSFUL"' ]
 
       - name: Cache llm2 models
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v6
         env:
           cache-name: cache-llm2-models
         with: