chore(deps): bump the npm_and_yarn group across 2 directories with 1 update

Bumps the npm_and_yarn group with 1 update in the /e2e/scenarios/nextjs-instrumentation directory: [next](https://github.com/vercel/next.js).
Bumps the npm_and_yarn group with 1 update in the /e2e/scenarios/turbopack-auto-instrumentation directory: [next](https://github.com/vercel/next.js).


Updates `next` from 14.2.34 to 15.5.18
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.34...v15.5.18)

Updates `next` from 16.2.1 to 16.2.6
- [Release notes](https://github.com/vercel/next.js/releases)
- [Changelog](https://github.com/vercel/next.js/blob/canary/release.js)
- [Commits](vercel/next.js@v14.2.34...v15.5.18)

---
updated-dependencies:
- dependency-name: next
  dependency-version: 15.5.18
  dependency-type: direct:production
  dependency-group: npm_and_yarn
- dependency-name: next
  dependency-version: 16.2.6
  dependency-type: direct:production
  dependency-group: npm_and_yarn
...

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

Author: dependabot[bot]

e2e/scenarios/ai-sdk-otel-export/package.json

@@ -12,7 +12,7 @@
     }
   },
   "dependencies": {
-    "@opentelemetry/sdk-node": "0.201.1",
+    "@opentelemetry/sdk-node": "0.218.0",
     "ai-sdk-openai-v5": "npm:@ai-sdk/openai@2.0.57",
     "ai-sdk-openai-v6": "npm:@ai-sdk/openai@3.0.7",
     "ai-sdk-v5": "npm:ai@5.0.82",

e2e/scenarios/nextjs-instrumentation/package.json

@@ -7,7 +7,7 @@
     "@opentelemetry/exporter-trace-otlp-http": "0.200.0",
     "@opentelemetry/sdk-trace-base": "2.0.0",
     "@vercel/otel": "2.1.0",
-    "next": "14.2.34",
+    "next": "15.5.18",
     "react": "18.3.1",
     "react-dom": "18.3.1"
   },

e2e/scenarios/turbopack-auto-instrumentation/package.json

@@ -2,7 +2,7 @@
   "name": "@braintrust/e2e-turbopack-auto-instrumentation",
   "private": true,
   "dependencies": {
-    "next": "16.2.1",
+    "next": "16.2.6",
     "openai": "6.32.0",
     "react": "19.2.4",
     "react-dom": "19.2.4"