Bump langchain from 0.0.338 to 0.2.3

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.0.338 to 0.2.3.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@v0.0.338...langchain==0.2.3)

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

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

requirements/requirements.txt

@@ -13,7 +13,6 @@ annotated-types==0.6.0
 anyio==3.7.1
     # via
     #   httpx
-    #   langchain
     #   openai
 arrow==1.3.0
     # via -r requirements/requirements.in
@@ -30,8 +29,6 @@ charset-normalizer==3.3.2
     # via requests
 click==8.1.7
     # via -r requirements/requirements.in
-dataclasses-json==0.6.2
-    # via langchain
 distro==1.8.0
     # via openai
 faiss-cpu==1.7.4
@@ -61,38 +58,45 @@ idna==3.4
     #   requests
     #   yarl
 jsonpatch==1.33
-    # via langchain
+    # via langchain-core
 jsonpointer==2.4
     # via jsonpatch
-langchain==0.0.338
+langchain==0.2.3
     # via -r requirements/requirements.in
-langsmith==0.0.65
+langchain-core==0.2.5
+    # via
+    #   langchain
+    #   langchain-text-splitters
+langchain-text-splitters==0.2.1
     # via langchain
+langsmith==0.1.77
+    # via
+    #   langchain
+    #   langchain-core
 loguru==0.7.2
     # via -r requirements/requirements.in
 markdown-it-py==3.0.0
     # via rich
-marshmallow==3.20.1
-    # via dataclasses-json
 mdurl==0.1.2
     # via markdown-it-py
 multidict==6.0.4
     # via
     #   aiohttp
     #   yarl
-mypy-extensions==1.0.0
-    # via typing-inspect
 numpy==1.26.2
     # via langchain
 openai==1.3.3
     # via -r requirements/requirements.in
+orjson==3.10.4
+    # via langsmith
 packaging==23.2
-    # via marshmallow
+    # via langchain-core
 prompt-toolkit==3.0.43
     # via -r requirements/requirements.in
 pydantic==2.5.1
     # via
     #   langchain
+    #   langchain-core
     #   langsmith
     #   openai
 pydantic-core==2.14.3
@@ -107,6 +111,7 @@ pyyaml==6.0.1
     # via
     #   -r requirements/requirements.in
     #   langchain
+    #   langchain-core
 regex==2023.10.3
     # via tiktoken
 requests==2.31.0
@@ -129,7 +134,9 @@ soupsieve==2.5
 sqlalchemy==2.0.23
     # via langchain
 tenacity==8.2.3
-    # via langchain
+    # via
+    #   langchain
+    #   langchain-core
 tiktoken==0.5.1
     # via -r requirements/requirements.in
 tqdm==4.66.1
@@ -142,9 +149,6 @@ typing-extensions==4.8.0
     #   pydantic
     #   pydantic-core
     #   sqlalchemy
-    #   typing-inspect
-typing-inspect==0.9.0
-    # via dataclasses-json
 urllib3==2.1.0
     # via requests
 wcwidth==0.2.10