help: Fix minor grammatical syntax

help: Fix comma usage within pgp-create.page

help/C/pgp-create.page

@@ -78,7 +78,7 @@
 <section id="advanced" ui:expanded="false">
   <title>Advanced PGP key options</title>
 
-  <p>Under <gui>Advanced key options</gui> you can choose custom values
+  <p>Under <gui>Advanced key options</gui>, you can choose custom values
   for encryption type, key strength and key expiration date.</p>
 
   <terms>
@@ -101,7 +101,7 @@
     <title>Expiration Date</title>
       <p>When a key expires, <link xref="pgp-expired">certain actions no longer
       work</link>. In <app>Passwords and Keys</app>, you can
-      either set your key to <gui style="checkbox">Never Expire</gui>, or
+      either set your key to <gui style="checkbox">Never Expire</gui> or
       select an expiration date for it.</p>
       <p>It is recommended that you set an expiration date in case you lose
       access to the key. Even if your key expires, you can