Change the default error format for Cypher Shell (#2423)

Author: NataliaIvakina

modules/ROOT/pages/cypher-shell.adoc

@@ -121,7 +121,7 @@ Can also be set using the environment variable `NEO4J_CYPHER_SHELL_HISTORY`.
 
 |--error-format {gql,legacy,stacktrace}
 |Controls how errors are displayed.
-|legacy
+|gql label:new[Changed in 2025.06]
 |===
 
 == Connection arguments