Update copy for right panel verification

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/components/views/verification/VerificationShowSas.js

@@ -105,7 +105,7 @@ export default class VerificationShowSas extends React.Component {
 
         return <div className="mx_VerificationShowSas">
             <p>{sasCaption}</p>
-            <p>{_t("For ultimate security, do this in person or use another way to communicate.")}</p>
+            <p>{_t("To be secure, do this in person or use another way to communicate.")}</p>
             {sasDisplay}
             {confirm}
         </div>;