message: Fix typos in some strings
  This commit fixes some typos that I've stumbled upon.
diff: @@ -393,14 +393,14 @@ export default class CallHandler {
  title = _t("Unable to access microphone");
  description = <div>
  {_t(
  - "Call failed because no microphone could not be accessed. " +
  + "Call failed because microphone could not be accessed. " +
  "Check that a microphone is plugged in and set up correctly.",
  )}
  </div>;
  } else if (call.type === CallType.Video) {
  title = _t("Unable to access webcam / microphone");
  description = <div>
  - {_t("Call failed because no webcam or microphone could not be accessed. Check that:")}
  + {_t("Call failed because webcam or microphone could not be accessed. Check that:")}
  <ul>
  <li>{_t("A microphone and webcam are plugged in and set up correctly")}</li>
  <li>{_t("Permission is granted to use the webcam")}</li>
  