Bump @langchain/anthropic from 0.3.34 to 1.3.26

Bumps [@langchain/anthropic](https://github.com/langchain-ai/langchainjs) from 0.3.34 to 1.3.26.
- [Release notes](https://github.com/langchain-ai/langchainjs/releases)
- [Commits](https://github.com/langchain-ai/langchainjs/compare/langchain==0.3.34...@langchain/anthropic@1.3.26)

---
updated-dependencies:
- dependency-name: "@langchain/anthropic"
  dependency-version: 1.3.26
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -19,7 +19,7 @@
     "test:watch": "vitest"
   },
   "dependencies": {
-    "@langchain/anthropic": "^0.3.11",
+    "@langchain/anthropic": "^1.3.26",
     "@langchain/core": "^0.3.27",
     "@langchain/langgraph": "^0.2.36",
     "@langchain/openai": "^0.3.16",