Add missing "a" in sentence

index.html

@@ -307,7 +307,7 @@ <h3>Sampling and Reporting Rate</h3>
   </p>
   <p>
     For automation purposes, a [=platform collector=] must have the ability to
-    connect to [=virtual pressure sources=] and use their simulated data
+    connect to [=virtual pressure sources=] and use their simulated data as
     [=pressure states=] rather than raw platform data that must be transformed
     into an [=adjusted pressure state=].
   </p>