Bump aiohttp from 3.11.18 to 3.13.1 in /server

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-version: 3.13.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -1,6 +1,6 @@
 # prod
 aiofile==3.9.*
-aiohttp==3.11.18
+aiohttp==3.13.1
 beautifulsoup4==4.13.*
 celery==5.5.*
 channels==4.2.*