Fix syntax

Author: NataliaIvakina

modules/ROOT/pages/backup-restore/online-backup.adoc

@@ -165,7 +165,7 @@ Note: this is an EXPERIMENTAL option. Consult Neo4j support before use.
 |label:new[Introduced in 2025.04] When performing a differential backup, prefer the latest non-empty differential backup as the parent instead of the latest backup.
 |false
 
-|--remote-address-resolution[=true|false]
+|--remote-address-resolution[=true\|false]
 |label:new[Introduced in 2025.09] Allow the DBMS to automatically determine which servers are eligible to serve as backup sources, instead of requiring manual selection.
 |false