Update aiohttp requirement from >=3.8.0 to >=3.13.5

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-version: 3.13.5
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 # Core Dependencies
 aiofiles>=0.8.0
-aiohttp>=3.8.0
+aiohttp>=3.13.5
 anthropic
 asyncio-mqtt
 docling