Update wiki links

README.md

@@ -7,7 +7,7 @@ Get Android app updates straight from the source.
 Obtainium allows you to install and update apps directly from their releases pages, and receive notifications when new releases are made available.
 
 More info:
-- [Obtainium Wiki](https://github.com/ImranR98/Obtainium/wiki)
+- [Obtainium Wiki](https://wiki.obtainium.imranr.dev/) ([repository](https://github.com/ImranR98/Obtainium-Wiki))
 - [AppVerifier](https://github.com/soupslurpr/AppVerifier) - App verification tool (recommended, integrates with Obtainium)
 - [apps.obtainium.imranr.dev](https://apps.obtainium.imranr.dev/) - Crowdsourced app configurations ([repository](https://github.com/ImranR98/apps.obtainium.imranr.dev))
 - [Side Of Burritos - You should use this instead of F-Droid | How to use app RSS feed](https://youtu.be/FFz57zNR_M0) - Original motivation for this app

fastlane/metadata/android/en-US/full_description.txt

@@ -1,5 +1,5 @@
 <p>Obtainium allows you to install and update Apps directly from their releases pages, and receive notifications when new releases are made available.</p>
-<p>Read the <a href="https://github.com/ImranR98/Obtainium/wiki">Wiki</a></p>
+<p>Read the <a href="https://wiki.obtainium.imranr.dev/">Wiki</a></p>
 <p>
 	<b>Currently supported App sources:</b>
 </p>

fastlane/metadata/android/ru/full_description.txt

@@ -1,5 +1,5 @@
 <p>Obtainium позволяет вам устанавливать и обновлять приложения прямо с их объявлений о выпусках и получать уведомления о новых выпусках.</p>
-<p>Для деталей читайте <a href="https://github.com/ImranR98/Obtainium/wiki">Вики</a></p>
+<p>Для деталей читайте <a href="https://wiki.obtainium.imranr.dev/">Вики</a></p>
 <p>
 	<b>Поддерживаемые источники приложений:</b>
 </p>

lib/pages/settings.dart

@@ -886,7 +886,7 @@ class _SettingsPageState extends State<SettingsPage> {
                     ),
                     IconButton(
                       onPressed: () {
-                        launchUrlString('${settingsProvider.sourceUrl}/wiki',
+                        launchUrlString('https://wiki.obtainium.imranr.dev/',
                             mode: LaunchMode.externalApplication);
                       },
                       icon: const Icon(Icons.help_outline_rounded),