chore(deps): bump ccxt from 4.5.5 to 4.5.6

Bumps [ccxt](https://github.com/ccxt/ccxt) from 4.5.5 to 4.5.6.
- [Release notes](https://github.com/ccxt/ccxt/releases)
- [Changelog](https://github.com/ccxt/ccxt/blob/master/exchanges.cfg)
- [Commits](https://github.com/ccxt/ccxt/compare/v4.5.5...v4.5.6)

---
updated-dependencies:
- dependency-name: ccxt
  dependency-version: 4.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -7,7 +7,7 @@ ft-pandas-ta==0.3.15
 ta-lib==0.6.7
 technical==1.5.3
 
-ccxt==4.5.5
+ccxt==4.5.6
 cryptography==46.0.1
 aiohttp==3.12.15
 SQLAlchemy==2.0.43