Add a new version-update check telemetry evetn

code/lib/core-server/src/utils/update-check.ts

@@ -5,6 +5,7 @@ import semver from 'semver';
 import { dedent } from 'ts-dedent';
 import { cache } from '@storybook/core-common';
 import type { VersionCheck } from '@storybook/types';
+import { telemetry } from '@storybook/telemetry';
 
 const { STORYBOOK_VERSION_BASE = 'https://storybook.js.org', CI } = process.env;
 
@@ -16,6 +17,8 @@ export const updateCheck = async (version: string): Promise<VersionCheck> => {
 
     // if last check was more then 24h ago
     if (time - 86400000 > fromCache.time && !CI) {
+      telemetry('version-update');
+
       const fromFetch: any = await Promise.race([
         fetch(`${STORYBOOK_VERSION_BASE}/versions.json?current=${version}`),
         // if fetch is too slow, we won't wait for it

code/lib/telemetry/src/types.ts

@@ -3,7 +3,15 @@ import type { PM } from 'detect-package-manager';
 
 import type { MonorepoType } from './get-monorepo-type';
 
-export type EventType = 'boot' | 'dev' | 'build' | 'upgrade' | 'init' | 'error' | 'error-metadata';
+export type EventType =
+  | 'boot'
+  | 'dev'
+  | 'build'
+  | 'upgrade'
+  | 'init'
+  | 'error'
+  | 'error-metadata'
+  | 'version-update';
 
 export interface Dependency {
   version: string | undefined;