build(deps-dev): bump pre-commit from 2.11.0 to 2.11.1 in /backend (#828

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Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.11.0 to 2.11.1.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v2.11.0...v2.11.1)

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

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

backend/requirements-dev.txt

@@ -1,5 +1,5 @@
 fakeredis==1.4.5
-pre-commit==2.11.0
+pre-commit==2.11.1
 pytest==6.2.2
 pytest-responses==0.4.0
 responses==0.12.1