[Chat] Rename invite route to /chat/ (#10782)

src/lib/strings/url-helpers.ts

@@ -179,7 +179,7 @@ export function isBskyStarterPackUrl(url: string): boolean {
 }
 
 // Invite codes are 7 alphanumeric characters long, supporting up to 10 here to future-proof.
-export const CHAT_INVITE_CODE_REGEX = /^\/c\/([a-zA-Z0-9]{7,10})$/
+export const CHAT_INVITE_CODE_REGEX = /^\/chat\/([a-zA-Z0-9]{7,10})$/
 
 export function getChatInviteCodeFromUrl(url: string): string | undefined {
   let pathname: string