Apply suggestions from code review

Co-authored-by: florent-leborgne <[email protected]>

Author: emilioalvap

solutions/observability/synthetics/configure-lightweight-monitors.md

@@ -369,7 +369,7 @@ $$$monitor-namespace$$$
 **`namespace`**
 :   Type: [string](/solutions/observability/synthetics/configure-lightweight-monitors.md#synthetics-lightweight-data-string)  
 
-    Assign the monitor to a specific datastream namespace. Overrides the default value, Kibana's namespace.
+    Assign the monitor to a specific datastream namespace. Defaults to Kibana's namespace.
 
     **Examples**:
 

solutions/observability/synthetics/configure-projects.md

@@ -282,7 +282,7 @@ $$$synthetics-configuration-monitor-tags$$$ `tags` (`Array<string>`)
     ```
 
 `namespace` (`string`)
-:   Assign the monitor to a specific datastream namespace. Overrides the default value, Kibana's namespace.
+:   Assign the monitor to a specific datastream namespace. Defaults to Kibana's namespace.
 
     For example: