fix comment (#1211)

Author: kaibolay

src/v2/providers/alerts/appDistribution.ts

@@ -66,7 +66,7 @@ export interface InAppFeedbackPayload {
  appVersion: string;
  /** Text entered by the tester */
  text: string;
- /** URI to download screenshot. This URIs are is fast expiring. */
+ /** URI to download screenshot. This URI is fast expiring. */
  screenshotUri?: string;
 }