Swap out the media permissions text for a paragraph element

The sizing ratio looks way off when the text is just subtext.

src/components/views/settings/tabs/VoiceSettingsTab.js

@@ -98,7 +98,7 @@ export default class VoiceSettingsTab extends React.Component {
         if (this.state.mediaDevices === false) {
             requestButton = (
                 <div>
-                    <span className="mx_SettingsTab_subsectionText">{_t("Missing media permissions, click the button below to request.")}</span>
+                    <p>{_t("Missing media permissions, click the button below to request.")}</p>
                     <AccessibleButton onClick={this._requestMediaPermissions} kind="primary">
                         {_t("Request media permissions")}
                     </AccessibleButton>