chore: version packages (#11172)

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# Releases
## @langchain/core@1.2.2

### Patch Changes

- [#11171](#11171)
[`82bef01`](82bef01)
Thanks [@christian-bromann](https://github.com/christian-bromann)! -
fix(core): coerce string v1 AIMessage content to text blocks

  Prevent `contentBlocks.push is not a function` when constructing an
`AIMessage` with `response_metadata.output_version === "v1"` and string
  `content` (common in serialized LangGraph stream payloads).

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.changeset/fix-aimessage-v1-string-content.md

@@ -1,5 +1,15 @@
 # @langchain/core
 
+## 1.2.2
+
+### Patch Changes
+
+- [#11171](https://github.com/langchain-ai/langchainjs/pull/11171) [`82bef01`](https://github.com/langchain-ai/langchainjs/commit/82bef01ad3dd5e0317e48da40707be6bccc52f94) Thanks [@christian-bromann](https://github.com/christian-bromann)! - fix(core): coerce string v1 AIMessage content to text blocks
+
+  Prevent `contentBlocks.push is not a function` when constructing an
+  `AIMessage` with `response_metadata.output_version === "v1"` and string
+  `content` (common in serialized LangGraph stream payloads).
+
 ## 1.2.1
 
 ### Patch Changes

libs/langchain-core/CHANGELOG.md

@@ -1,6 +1,6 @@
 {
   "name": "@langchain/core",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "description": "Core LangChain.js abstractions and schemas",
   "type": "module",
   "engines": {