chore(deps): bump pymilvus from 2.4.9 to 2.5.0 in /backend

Bumps [pymilvus](https://github.com/milvus-io/pymilvus) from 2.4.9 to 2.5.0.
- [Release notes](https://github.com/milvus-io/pymilvus/releases)
- [Commits](https://github.com/milvus-io/pymilvus/compare/v2.4.9...v2.5.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

backend/requirements.txt

@@ -44,7 +44,7 @@ langchain-chroma==0.1.4
 
 fake-useragent==1.5.1
 chromadb==0.5.15
-pymilvus==2.4.9
+pymilvus==2.5.0
 qdrant-client~=1.12.0
 opensearch-py==2.7.1