Bump codecov from 2.1.10 to 2.1.11 in /src/requirements

Bumps [codecov](https://github.com/codecov/codecov-python) from 2.1.10 to 2.1.11.
- [Release notes](https://github.com/codecov/codecov-python/releases)
- [Changelog](https://github.com/codecov/codecov-python/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-python/compare/v2.1.10...v2.1.11)

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

src/requirements/dev.txt

@@ -3,7 +3,7 @@
 django-debug-toolbar==2.2.1
 factory_boy==3.1.0
 coverage==5.5
-codecov==2.1.10
+codecov==2.1.11
 black==21.5b1
 pre-commit==2.12.1
 isort==5.8.0