Update product-updates/knowledge-center/index.html

Co-authored-by: Alex P.  <63075587+ADPennington@users.noreply.github.com>

product-updates/knowledge-center/index.html

@@ -363,7 +363,7 @@ <h5 class="usa-icon-list__title">
           Increased actionability of file upload error messages
         </h5>
         <p>
-      In cases where a user attempts to upload an incompatible file type to TDP we're now triggering a more <a href="lightbox">descriptive error message</a> that describes which file types are accepted and compatible with TDP; Files ending in .txt, .ms##, .ts##, or .ts###. The filename of the incompatible file also now stays onscreen so that it can be more easily compared to the list of accepted file types. 
+      In cases where a user attempts to upload an incompatible file type to TDP we're now triggering a more <a href="lightbox">descriptive error message</a> that describes which file types are accepted and compatible with TDP; acceptable file types can end in: .txt, .ms##, .ts##, or .ts###. The filename of the incompatible file also now stays onscreen so that it can be more easily compared to the list of accepted file types. 
         </p>
       </div>
     </li>