fix typing of olmVersion in settings

Author: t3chguy

src/components/views/settings/tabs/user/HelpUserSettingsTab.tsx

@@ -72,8 +72,10 @@ export default class HelpUserSettingsTab extends React.Component<IProps, IState>
     private getVersionInfo(): { appVersion: string, olmVersion: string } {
         const brand = SdkConfig.get().brand;
         const appVersion = this.state.appVersion || 'unknown';
-        let olmVersion = MatrixClientPeg.get().olmVersion;
-        olmVersion = olmVersion ? `${olmVersion[0]}.${olmVersion[1]}.${olmVersion[2]}` : '<not-enabled>';
+        const olmVersionTuple = MatrixClientPeg.get().olmVersion;
+        const olmVersion = olmVersionTuple
+            ? `${olmVersionTuple[0]}.${olmVersionTuple[1]}.${olmVersionTuple[2]}`
+            : '<not-enabled>';
 
         return {
             appVersion: `${_t("%(brand)s version:", { brand })} ${appVersion}`,