Bump web3 from 6.14.0 to 6.15.0

Bumps [web3](https://github.com/ethereum/web3.py) from 6.14.0 to 6.15.0.
- [Changelog](https://github.com/ethereum/web3.py/blob/v6.15.0/docs/releases.rst)
- [Commits](ethereum/web3.py@v6.14.0...v6.15.0)

---
updated-dependencies:
- dependency-name: web3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -8,4 +8,4 @@ requests==2.31.0
 safe-eth-py==6.0.0b14
 tabulate==0.9.0
 trezor==0.13.8
-web3==6.14.0
+web3==6.15.0