Fix grammar in diagram description.

Co-authored-by: Ted Thibodeau Jr <tthibodeau@openlinksw.com>

vocab/security/template.html

@@ -270,7 +270,7 @@ <h2>Diagram description</h2>
         </p>
         <p>
           Each of these sections has an ellipse at the top, labeled as "Proof", "VerificationMethod", 
-          and "VerificationRelationship", respectively. Additionally, the Verification Method section also
+          and "VerificationRelationship", respectively. The Verification Method section
           includes an additional ellipse, labeled as "ControllerDocument", side-by-side with the ellipse
           labeled as "VerificationMethod".
         </p>
@@ -310,7 +310,7 @@ <h3>Verification Method Section</h3>
             Each of these is connected to the "VerificationMethod" ellipse, with a line styled as "Domain Of".
             The "controller" "Property" box is also connected to the "ControllerDocument" ellipse, while
             the "expires" "Property" box is also connected to the "Proof" ellipse (in the Proof section);
-            both these extra connections are also with a line styled as "Domain Of".
+            both of these extra connecting lines are styled as "Domain Of".
           </p>
 
           <p>