build(deps-dev): bump responses from 0.25.6 to 0.25.7 in /backend (#2628)

Bumps [responses](https://github.com/getsentry/responses) from 0.25.6 to 0.25.7.
- [Release notes](https://github.com/getsentry/responses/releases)
- [Changelog](https://github.com/getsentry/responses/blob/master/CHANGES)
- [Commits](getsentry/responses@0.25.6...0.25.7)

---
updated-dependencies:
- dependency-name: responses
  dependency-version: 0.25.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

backend/requirements-dev.txt

@@ -2,4 +2,4 @@ fakeredis==2.26.2
 pre-commit==4.2.0
 pytest==8.3.4
 pytest-responses==0.5.1
-responses==0.25.6
+responses==0.25.7