Update langchain requirement in /libs/langchain-mongodb

Updates the requirements on [langchain](https://github.com/langchain-ai/langchain) to permit the latest version.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.3.14...langchain==1.0.5)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 1.0.5
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

libs/langchain-mongodb/pyproject.toml

@@ -21,7 +21,7 @@ dependencies = [
 [dependency-groups]
 dev = [
     "freezegun>=1.2.2",
-    "langchain>=0.3.14,<1.0",
+    "langchain>=0.3.14,<2.0",
     "langchain-core>=0.3.29,<1.0",
     "langchain-text-splitters>=0.3.5,<1.0",
     "pytest-mock>=3.10.0",