chore(deps): bump the pip group across 2 directories with 2 updates

Bumps the pip group with 2 updates in the / directory: [pymysql](https://github.com/PyMySQL/PyMySQL) and [langchain-community](https://github.com/langchain-ai/langchain).
Bumps the pip group with 1 update in the /backend directory: [langchain-community](https://github.com/langchain-ai/langchain).


Updates `pymysql` from 1.1.0 to 1.1.1
- [Release notes](https://github.com/PyMySQL/PyMySQL/releases)
- [Changelog](https://github.com/PyMySQL/PyMySQL/blob/main/CHANGELOG.md)
- [Commits](https://github.com/PyMySQL/PyMySQL/compare/v1.1.0...v1.1.1)

Updates `langchain-community` from 0.2.0 to 0.2.9
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain-community==0.2.0...langchain-community==0.2.9)

Updates `langchain-community` from 0.2.6 to 0.2.9
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](https://github.com/langchain-ai/langchain/compare/langchain-community==0.2.0...langchain-community==0.2.9)

---
updated-dependencies:
- dependency-name: pymysql
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: langchain-community
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: langchain-community
  dependency-type: direct:production
  dependency-group: pip
...

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

backend/requirements.txt

@@ -34,7 +34,7 @@ google-generativeai==0.5.4
 tiktoken
 
 langchain==0.2.6
-langchain-community==0.2.6
+langchain-community==0.2.9
 langchain-chroma==0.1.2
 
 fake-useragent==1.5.1

pyproject.toml

@@ -23,7 +23,7 @@ dependencies = [
     "peewee==3.17.5",
     "peewee-migrate==1.12.2",
     "psycopg2-binary==2.9.9",
-    "PyMySQL==1.1.0",
+    "PyMySQL==1.1.1",
     "bcrypt==4.1.3",
 
     "boto3==1.34.110",
@@ -33,7 +33,7 @@ dependencies = [
     "google-generativeai==0.5.4",
 
     "langchain==0.2.0",
-    "langchain-community==0.2.0",
+    "langchain-community==0.2.9",
     "langchain-chroma==0.1.1",
 
     "fake-useragent==1.5.1",