chore(deps-dev): bump @opentelemetry/core from 2.0.1 to 2.8.0

Bumps [@opentelemetry/core](https://github.com/open-telemetry/opentelemetry-js) from 2.0.1 to 2.8.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-js/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-js/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-js@v2.0.1...v2.8.0)

---
updated-dependencies:
- dependency-name: "@opentelemetry/core"
  dependency-version: 2.8.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package.json

@@ -41,7 +41,7 @@
     "@langchain/langgraph": "^1.1.4",
     "@langchain/openai": "^1.2.7",
     "@opentelemetry/api": "^1.9.0",
-    "@opentelemetry/core": "^2.0.1",
+    "@opentelemetry/core": "^2.8.0",
     "@opentelemetry/resources": "^2.0.1",
     "@opentelemetry/sdk-node": "^0.217.0",
     "@opentelemetry/sdk-trace-base": "^2.0.1",