Edited ch01_intro.adoc with Atlas code editor

ch01_intro.adoc

@@ -275,7 +275,7 @@ to restore her wallet.
 [[recovery_code_intro]]
 ==== Recovery Codes
 
-Most ((("wallets", "recovery codes", id="wallet-recovery")))((("recovery codes", id="recovery-code")))((("backups", "recovery codes", see="recovery codes")))modern noncustodial Bitcoin wallets will provide a _recovery
+Most ((("wallets", "recovery codes", id="wallet-recovery")))((("recovery codes", id="recovery-code")))((("backing up", "recovery codes", see="recovery codes")))modern noncustodial Bitcoin wallets will provide a _recovery
 code_ for their user
 to back up.  The recovery code usually consists of numbers, letters, or words
 selected randomly by the software, and is used as the basis for the keys