Add error code 40333 (#6557)

docs/topics/Opcodes_and_Status_Codes.md

@@ -215,6 +215,7 @@ Along with the HTTP error code, our API can also return more detailed error code
 | 40066 | There are no tags available that can be set by non-moderators |
 | 40067 | A tag is required to create a forum post in this channel |
 | 40074 | An entitlement has already been granted for this resource |
+| 40333 | Cloudflare is blocking your request. This can often be resolved by setting a proper [User Agent](#DOCS_REFERENCE/user-agent) |
 | 50001 | Missing access |
 | 50002 | Invalid account type |
 | 50003 | Cannot execute action on a DM channel |