Bump restrictedpython from 7.3 to 7.4 (#4141)

Bumps [restrictedpython](https://github.com/zopefoundation/RestrictedPython) from 7.3 to 7.4.
- [Changelog](https://github.com/zopefoundation/RestrictedPython/blob/master/CHANGES.rst)
- [Commits](zopefoundation/RestrictedPython@7.3...7.4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements_test.txt

@@ -6,4 +6,4 @@ pytest-asyncio==0.24.0
 pytest-cov==5.0.0
 pytest-snapshot==0.9.0
 pytest-socket==0.7.0
-RestrictedPython==7.3
+RestrictedPython==7.4