Fix wrong property name (#5260)

Author: carlesarnal

app/src/main/resources/application.properties

@@ -154,8 +154,8 @@ apicurio.rest.artifact.download.max-size.bytes=1000000
 apicurio.rest.artifact.download.ssl-validation.disabled=false
 apicurio.rest.artifact.deletion.enabled=false
 # Api date format
-apicurio.apis.v2.date-format=yyyy-MM-dd'T'HH:mm:ss'Z'
-apicurio.apis.v2.date-format-timezone=UTC
+apicurio.apis.date-format=yyyy-MM-dd'T'HH:mm:ss'Z'
+apicurio.apis.date-format-timezone=UTC
 
 # Storage
 apicurio.storage.kind=sql