chore(deps): bump undici from 6.21.3 to 7.15.0

Bumps [undici](https://github.com/nodejs/undici) from 6.21.3 to 7.15.0.
- [Release notes](https://github.com/nodejs/undici/releases)
- [Commits](nodejs/undici@v6.21.3...v7.15.0)

---
updated-dependencies:
- dependency-name: undici
  dependency-version: 7.15.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -34,7 +34,7 @@
   },
   "homepage": "https://github.com/upstash/context7#readme",
   "dependencies": {
-    "undici": "^6.6.3",
+    "undici": "^7.15.0",
     "@modelcontextprotocol/sdk": "^1.13.2",
     "commander": "^14.0.0",
     "zod": "^3.24.2"