chore: remove deprecated instrumentationHook config and bump to v1.3.2

Remove the `experimental.instrumentationHook` option from the generated
`next.config.mjs` template, as it is no longer needed in newer versions
of Next.js. Bump package version from 1.3.1 to 1.3.2.

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@zen/start",
-  "version": "1.3.0",
+  "version": "1.3.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@zen/start",
-      "version": "1.3.0",
+      "version": "1.3.2",
       "license": "GPL-3.0-only",
       "dependencies": {
         "fs-extra": "^11.2.0"