Update documentation/modules/appendix_crds.adoc

Co-authored-by: Gantigmaa Selenge <39860586+tinaselenge@users.noreply.github.com>
Signed-off-by: Lukáš Král <53821852+im-konge@users.noreply.github.com>

Author: im-konge

documentation/modules/appendix_crds.adoc

@@ -2683,7 +2683,7 @@ It must have the value `tls` for the type `KafkaUserTlsClientAuthentication`.
 |Number of days for which the user certificate should be valid. If not configured, Clients CA configuration is used.
 |renewalDays
 |integer
-|Configures how many days before the certificate expiration should be the user certificate renewed. If not configured, Clients CA configuration is used.
+|Number of days before certificate expiration when the user certificate should be renewed. If not configured, Clients CA configuration is used.
 |====
 
 [id='type-KafkaUserTlsExternalClientAuthentication-{context}']