Bump boto3 in /functions/most_popular_repo_langchain

Bumps [boto3](https://github.com/boto/boto3) from 1.35.71 to 1.35.90.
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.35.71...1.35.90)

---
updated-dependencies:
- dependency-name: boto3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

functions/most_popular_repo_langchain/requirements.txt

@@ -2,5 +2,5 @@ langchain==0.3.9
 langchain-community==0.3.8
 requests==2.32.3
 PyGithub==2.5.0
-boto3==1.35.71
+boto3==1.35.90
 beautifulsoup4