chore(deps): bump sentence-transformers from 2.7.0 to 3.0.1 in /backend

Bumps [sentence-transformers](https://github.com/UKPLab/sentence-transformers) from 2.7.0 to 3.0.1.
- [Release notes](https://github.com/UKPLab/sentence-transformers/releases)
- [Commits](https://github.com/UKPLab/sentence-transformers/compare/v2.7.0...v3.0.1

)

---
updated-dependencies:
- dependency-name: sentence-transformers
  dependency-type: direct:production
  update-type: version-update:semver-major
...
Signed-off-by: dependabot[bot] <support@github.com>

backend/requirements.txt

@@ -36,7 +36,7 @@ langchain-chroma==0.1.2
 
 fake-useragent==1.5.1
 chromadb==0.5.3
-sentence-transformers==2.7.0
+sentence-transformers==3.0.1
 pypdf==4.2.0
 docx2txt==0.8
 python-pptx==0.6.23