[lib] modify queryTimeout

Summary:
@Ashoat was unable to see usernames on web after logging in following the CSAT launch. he's seen this on native, too. we suspect that the timeout is too short.

more context here: https://linear.app/comm/issue/ENG-9227/ashoat-didnt-see-usernames-on-web-after-logging-in-following-csat

Test Plan: modified identity RPC to sleep for 15 seconds and the previous 10 second timeout was triggered. after changing the timeout duration, I was able to get a response from identity

Reviewers: ashoat

Reviewed By: ashoat

Subscribers: tomek, ashoat

Differential Revision: https://phab.comm.dev/D13277

lib/components/user-identity-cache.react.js

@@ -12,7 +12,7 @@ import sleep from '../utils/sleep.js';
 
 const cacheTimeout = 24 * 60 * 60 * 1000; // one day
 const failedQueryCacheTimeout = 5 * 60 * 1000; // five minutes
-const queryTimeout = 10 * 1000; // ten seconds
+const queryTimeout = 20 * 1000; // twenty seconds
 
 async function throwOnTimeout(identifier: string) {
   await sleep(queryTimeout);