Update phrasing on donate megaphone dismiss button.

app/src/main/java/org/thoughtcrime/securesms/megaphone/Megaphones.java

@@ -234,7 +234,7 @@ public final class Megaphones {
                           controller.onMegaphoneCompleted(megaphone.getEvent());
                           CommunicationActions.openBrowserLink(controller.getMegaphoneActivity(), context.getString(R.string.donate_url));
                         })
-                        .setSecondaryButton(R.string.DonateMegaphone_not_now, (megaphone, controller) -> controller.onMegaphoneCompleted(megaphone.getEvent()))
+                        .setSecondaryButton(R.string.DonateMegaphone_no_thanks, (megaphone, controller) -> controller.onMegaphoneCompleted(megaphone.getEvent()))
                         .setPriority(Megaphone.Priority.DEFAULT)
                         .build();
   }

app/src/main/res/values/strings.xml

@@ -478,7 +478,7 @@
     <string name="DonateMegaphone_donate_to_signal">Donate to Signal</string>
     <string name="DonateMegaphone_Signal_is_powered_by_people_like_you_show_your_support_today">Signal is powered by people like you. Show your support today!</string>
     <string name="DonateMegaphone_donate">Donate</string>
-    <string name="DonateMegaphone_not_now">Not Now</string>
+    <string name="DonateMegaphone_no_thanks">No Thanks</string>
 
     <!-- DozeReminder -->
     <string name="DozeReminder_optimize_for_missing_play_services">Optimize for missing Play Services</string>