chore(deps): bump aiohttp from 3.12.14 to 3.12.15

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-version: 3.12.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -9,7 +9,7 @@ technical==1.5.2
 
 ccxt==4.4.98
 cryptography==45.0.5
-aiohttp==3.12.14
+aiohttp==3.12.15
 SQLAlchemy==2.0.41
 python-telegram-bot==22.3
 # can't be hard-pinned due to telegram-bot pinning httpx with ~