fix: simplify lychee ignore patterns for internal routes

Author: Drew Stone

.lycheeignore

@@ -3,5 +3,5 @@ https://localhost*
 # Testnet explorer returns 401 but links are valid
 https://testnet-explorer.tangle.tools/*
 # Internal MDX routes without .mdx extension (valid Nextra routes, not filesystem paths)
-file://**/pages/network/claim-airdrop
-file://**/pages/operators/operator/join_operator/join
+**/claim-airdrop
+**/join_operator/join