Bump soupsieve from 2.6 to 2.7

Bumps [soupsieve](https://github.com/facelessuser/soupsieve) from 2.6 to 2.7.
- [Release notes](https://github.com/facelessuser/soupsieve/releases)
- [Commits](facelessuser/soupsieve@2.6...2.7)

---
updated-dependencies:
- dependency-name: soupsieve
  dependency-version: '2.7'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

app/backend/requirements.txt

@@ -386,7 +386,7 @@ sniffio==1.3.1
     #   anyio
     #   httpx
     #   openai
-soupsieve==2.6
+soupsieve==2.7
     # via beautifulsoup4
 std-uritemplate==2.0.5
     # via microsoft-kiota-abstractions