Bump web3 from 6.20.2 to 7.8.0

Bumps [web3](https://github.com/ethereum/web3.py) from 6.20.2 to 7.8.0.
- [Changelog](https://github.com/ethereum/web3.py/blob/main/docs/release_notes.rst)
- [Commits](ethereum/web3.py@v6.20.2...v7.8.0)

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

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

Author: dependabot[bot]

requirements.txt

@@ -18,4 +18,4 @@ safe-eth-py[django]==5.8.0
 # > ImportError: cannot import name 'geth_poa_middleware' from 'web3.middleware'
 # TODO: Remove when safe-eth-py updates web3 to >= 7
 # https://github.com/safe-global/safe-eth-py/pull/1315
-web3==6.20.2
+web3==7.8.0