Bump click from 8.1.7 to 8.1.8 in /backend/src

Bumps [click](https://github.com/pallets/click) from 8.1.7 to 8.1.8.
- [Release notes](https://github.com/pallets/click/releases)
- [Changelog](https://github.com/pallets/click/blob/main/CHANGES.rst)
- [Commits](pallets/click@8.1.7...8.1.8)

---
updated-dependencies:
- dependency-name: click
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backend/src/requirements.txt

@@ -1,5 +1,5 @@
 blinker==1.9.0
-click==8.1.7
+click==8.1.8
 Flask==3.1.0
 itsdangerous==2.2.0
 Jinja2==3.1.6