ignore tidb operator links with variables (pingcap#21706)

Author: dveeden

.lycheeignore

@@ -35,3 +35,4 @@ https://centminmod\.com/mydumper\.html
 https://docs\.pingcap\.com/tidb/v6\.6/system-variables#tidb_pessimistic_txn_aggressive_locking-new-in-v660
 https://docs\.pingcap\.com/tidb/v7\.6/system-variables#tidb_ddl_version-new-in-v760
 https://developers\.redhat\.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level
+https://.*github.*/%7B%7B%7B%20.tidb_operator_version%20%7D%7D%7D