chore(deps-dev): bump @opentelemetry/sdk-trace-base in /e2e

Bumps [@opentelemetry/sdk-trace-base](https://github.com/open-telemetry/opentelemetry-js) from 2.6.1 to 2.12.0.
- [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@v2.6.1...v2.12.0)

---
updated-dependencies:
- dependency-name: "@opentelemetry/sdk-trace-base"
  dependency-version: 2.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

e2e/package.json

@@ -16,7 +16,7 @@
     "@braintrust/seinfeld": "workspace:^",
     "@opentelemetry/api": ">=1.9.0",
     "@opentelemetry/context-async-hooks": ">=1.9.0",
-    "@opentelemetry/sdk-trace-base": ">=1.9.0",
+    "@opentelemetry/sdk-trace-base": ">=2.12.0",
     "@types/node": "^20.10.5",
     "braintrust": "workspace:^",
     "tsx": "^4.21.0",