Bump langchain-text-splitters

Bumps [langchain-text-splitters](https://github.com/langchain-ai/langchain) from 0.3.8 to 1.1.2.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-text-splitters==0.3.8...langchain-text-splitters==1.1.2)

---
updated-dependencies:
- dependency-name: langchain-text-splitters
  dependency-version: 1.1.2
  dependency-type: direct:production
...

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

Author: dependabot[bot]

ai/gen-ai-agents/custom-rag-agent/files/requirements.txt

@@ -90,7 +90,7 @@ langchain==0.3.26
 langchain-community==0.3.27
 langchain-core==0.3.81
 langchain-mcp-adapters==0.1.9
-langchain-text-splitters==0.3.8
+langchain-text-splitters==1.1.2
 langchain-unstructured==0.1.6
 langdetect==1.0.9
 langgraph==0.5.0