Update discord link (#5253)

* update discord link to cypress onlink

* update discord link in troubleshooting guide

* update discord link in main nav

Author: elylucas

docs/guides/references/troubleshooting.mdx

@@ -16,7 +16,7 @@ resolved.
 
 Check these support resources:
 
-- Connect with our community in [Discord](https://discord.gg/cypress)
+- Connect with our community in [Discord](https://on.cypress.io/discord)
 - Search existing [GitHub issues](https://github.com/cypress-io/cypress/issues)
 - Search this documentation (search is in the top right) 😉
 - Search [Stack Overflow](https://stackoverflow.com/questions/tagged/cypress)

docusaurus.config.js

@@ -138,7 +138,7 @@ const config = {
             'aria-label': 'Cypress GitHub repository',
           },
           {
-            href: 'https://discord.gg/cypress',
+            href: 'https://on.cypress.io/discord',
             position: 'right',
             className: 'discord-logo',
             'aria-label': 'Cypress Discord',
@@ -192,7 +192,7 @@ const config = {
               // },
               {
                 label: 'Discord',
-                href: 'https://discord.com/invite/cypress',
+                href: 'https://on.cypress.io/discord',
               },
               {
                 label: 'Twitter',