chore: bump ext-apps to 1.2.1

Changes since 1.2.0:
- fix: bundle SDK+zod in react-with-deps (was byte-identical to ./react) (#539)
- fix(build): copy schema.json to dist and externalize zod (#534)
- fix: skip debug log for high-frequency tool-input-partial notifications (#546)
- fix(deps): drop @hono/node-server override to patch GHSA-wc8c-qw6v-h7f6 (#535)
- fix(readme): use picture element for theme-aware logo (#545)
- fix(ci): require maintainer association for /update-snapshots trigger (#532)
- fix: pre-commit stages only originally-staged files; add .npmrc (#538)
- ci: use npm ci with caching, validate typedoc links, align Node versions (#533)
- test: exclude screenshot-gen from default E2E run; wire pdf-server tests (#537)

examples/basic-server-preact/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/server-basic-preact",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "type": "module",
   "description": "Basic MCP App Server example using Preact",
   "repository": {