Bump kombu from 4.6.10 to 5.2.4 in /worker

Bumps [kombu](https://kombu.readthedocs.io) from 4.6.10 to 5.2.4.

---
updated-dependencies:
- dependency-name: kombu
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

worker/setup.py

@@ -21,7 +21,7 @@
     python_requires=">=3.6",
     install_requires=[
         "celery==4.4.7",
-        "kombu==4.6.10",
+        "kombu==5.2.4",
         "configobj",
     ],
     zip_safe=False,