chore: [gen-11323] specify required perms for CLI custom config updates (#29725)

chore: specify required perms for CLI custom config updates

apps/docs/content/guides/database/custom-postgres-config.mdx

@@ -85,6 +85,12 @@ CLI changes permanently overwrite default settings, so `reset all` and `set to d
 
 </Admonition>
 
+<Admonition type="danger">
+
+In order to overwrite the default settings, you must have `Owner` or `Administrator` privileges within your organizations.
+
+</Admonition>
+
 #### CLI supported parameters
 
 <Admonition type="tip">