Update donate_url to start using wmf_ prefix parameters (#6091)

Author: cooltey

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

@@ -5,7 +5,7 @@
 
     <!-- URLs -->
     <string name="support_email">[email protected]</string>
-    <string name="donate_url">https://donate.wikimedia.org/?utm_medium=WikipediaApp&amp;utm_campaign=Android&amp;utm_source=%1$s&amp;uselang=%2$s&amp;app_version=%3$s</string>
+    <string name="donate_url">https://donate.wikimedia.org/?wmf_medium=WikipediaApp&amp;wmf_campaign=Android&amp;wmf_source=%1$s&amp;uselang=%2$s&amp;app_version=%3$s</string>
     <string name="talk_pages_survey_url">https://www.mediawiki.org/wiki/Wikimedia_Apps/Team/Android/Communication/UsertestingOctober2021</string>
     <string name="survey_privacy_policy_url">https://foundation.wikimedia.org/wiki/Legal:Wikipedia_Android_App_Onboarding_Survey_Privacy_Statement</string>
     <string name="image_captions_style_url">https://www.mediawiki.org/wiki/Special:MyLanguage/Help:Images</string>