Update broken redis tests (#12371)
Update broken redis tests -- tiny PR :)
- **Description:** Fixes Redis tests on master (look like it was broken
by https://github.com/langchain-ai/langchain/pull/11257)
- **Issue:** None,
- **Dependencies:** No
- **Tag maintainer:** @baskaryan @Spartee
- **Twitter handle:** N/A
Co-authored-by: Sam Partee <sam.partee@redis.com>
