Register LangChain v2 bootstrap mapping

Author: nagkumar91

opentelemetry-instrumentation/src/opentelemetry/instrumentation/bootstrap_gen.py

@@ -16,6 +16,10 @@
 # RUN `python scripts/generate_instrumentation_bootstrap.py` TO REGENERATE.
 
 libraries = [
+    {
+        "library": "langchain >= 0.3.21",
+        "instrumentation": "opentelemetry-instrumentation-langchain-v2==2.0b0.dev",
+    },
     {
         "library": "openai >= 1.26.0",
         "instrumentation": "opentelemetry-instrumentation-openai-v2",