build(deps): bump zstandard from 0.23.0 to 0.25.0 in /backend (#2794)

Bumps [zstandard](https://github.com/indygreg/python-zstandard) from 0.23.0 to 0.25.0.
- [Release notes](https://github.com/indygreg/python-zstandard/releases)
- [Changelog](https://github.com/indygreg/python-zstandard/blob/main/docs/news.rst)
- [Commits](indygreg/python-zstandard@0.23.0...0.25.0)

---
updated-dependencies:
- dependency-name: zstandard
  dependency-version: 0.25.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/requirements.txt

@@ -10,4 +10,4 @@ python-dateutil==2.9.0.post0
 pytoml==0.1.21
 redis==7.1.0
 swagger-ui-bundle==1.1.0
-zstandard==0.23.0
+zstandard==0.25.0