Fixed FAQ link and added delayed alerts FAQ (#9239)

DO NOT DELETE THIS TEXT

#### Please note

> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.

- [ ] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)

#### Testers

If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`
After you are done testing, you can remove the changes with `./scripts/github-remove`.  If there are schema changes, you can ask on discord how to revert.

doc/Support/FAQ.md

@@ -33,6 +33,7 @@ source: Support/FAQ.md
  - [How do I change the Device Type?](#faq33)
  - [Where do I update my database credentials?](#faq-where-do-i-update-my-database-credentials)
  - [My reverse proxy is not working](#my-reverse-proxy-is-not-working)
+ - [My alerts aren't being delivered on time](#my-alerts-aren't-being-delivered-on-time)
 
 ### Developing
  - [How do I add support for a new OS?](#faq8)
@@ -380,9 +381,12 @@ DB_PASSWORD=
 DB_PORT=
 ```
 
-### My reverse proxy is not working
+### <a name='my-reverse-proxy-is-not-working'>My reverse proxy is not working</a>
 
 Make sure your proxy is passing the proper variables.
 At a minimum: X-Forwarded-For and X-Forwarded-Proto (X-Forwarded-Port if needed)
 
 You also need to [Set the proxy or proxies as trusted](../Support/Environment-Variables.md#trusted-reverse-proxies)
+
+### <a name='my-alerts-aren't-being-delivered-on-time'>My alerts aren't being delivered on time</a>
+If you're running MySQL/MariaDB on a separate machine or container make sure the timezone is set properly on both the LibreNMS **and**  MySQL/MariaDB instance. Alerts will be delivered according to MySQL/MariaDB's time, so a mismatch between the two can cause alerts to be delivered late if LibreNMS is on a timezone later than MySQL/MariaDB.