chore(deps): bump certifi in /src/recommendationservice (GoogleCloudPlatform#3198)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2023.7.22 to 2024.7.4.
- [Commits](certifi/python-certifi@2023.07.22...2024.07.04)

---
updated-dependencies:
- dependency-name: certifi
  dependency-version: 2024.7.4
  dependency-type: indirect
...

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

Author: dependabot[bot]

src/recommendationservice/requirements.txt

@@ -2,7 +2,7 @@
 #    uv pip compile requirements.in -o requirements.txt
 cachetools==5.3.2
     # via google-auth
-certifi==2023.7.22
+certifi==2024.7.4
     # via requests
 charset-normalizer==3.3.2
     # via requests