Add Wikispeech to supported extensions

Will make it easier to test and review patches

Author: DannyS712

repositories.txt

@@ -49,6 +49,7 @@ mediawiki/extensions/TitleBlacklist w/extensions/TitleBlacklist
 mediawiki/extensions/UniversalLanguageSelector w/extensions/UniversalLanguageSelector
 mediawiki/extensions/UploadWizard w/extensions/UploadWizard
 mediawiki/extensions/WikiEditor w/extensions/WikiEditor
+mediawiki/extensions/Wikispeech w/extensions/Wikispeech
 mediawiki/skins/MonoBook w/skins/MonoBook
 mediawiki/skins/Timeless w/skins/Timeless
 mediawiki/skins/Vector w/skins/Vector