Update required npm version (#31263)

GitOrigin-RevId: c455d7803b41f5f62573522a619649f1b03ef94e

package-lock.json

@@ -64,7 +64,7 @@
         "typescript": "^5.9.3"
       },
       "engines": {
-        "npm": "11.4.2"
+        "npm": "11.6.2"
       }
     },
     "jobs/mirror-documentation": {

package.json

@@ -29,7 +29,7 @@
     "typescript": "^5.9.3"
   },
   "engines": {
-    "npm": "11.4.2"
+    "npm": "11.6.2"
   },
   "overrides": {
     "request@2.88.2": {