chore(deps): bump urllib3 from 1.26.17 to 1.26.18 in /api/tests/unit

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.17 to 1.26.18.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.17...1.26.18)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

api/tests/unit/requirements.txt

@@ -3,5 +3,5 @@ gql ; python_version >= '3.8'
 # Locking requests-toolbet and urllib3 to fix failing tests.
 # See https://stackoverflow.com/questions/76175487
 requests-toolbelt==0.10.1 ; python_version >= '3.8'
-urllib3==1.26.17 ; python_version >= '3.8'
+urllib3==1.26.18 ; python_version >= '3.8'
 requests<3,>=2.26 ; python_version >= '3.8'