Fix topbarLinks prop requirements in Global Settings

Author: fmerian

settings/global.mdx

@@ -222,7 +222,7 @@ settings. Learn more about the [properties](#properties) or from an
 ### Structure
 
 <ResponseField name="navigation" type="Navigation[]" required>
-  An array of groups with all the pages within that group
+  An array of groups with all the pages within that group.
   <Expandable title="Navigation">
     <ResponseField name="group" type="string">
     The name of the group.
@@ -245,12 +245,12 @@ settings. Learn more about the [properties](#properties) or from an
 </ResponseField>
 
 <ResponseField name="topbarLinks" type="TopbarLink[]">
-  Array of names and urls of links you want to include in the topbar
+  Array of names and urls of links you want to include in the topbar.
   <Expandable title="TopbarLink">
-    <ResponseField name="name" type="string">
+    <ResponseField name="name" type="string" required>
       The name of the button.
     </ResponseField>
-    <ResponseField name="url" type="string">
+    <ResponseField name="url" type="string" required>
       The url once you click on the button. Example: `https://mintlify.com/contact`
     </ResponseField>