switch PluginsManifest download URL to be from main branch

Author: jjw24

Flow.Launcher.Core/ExternalPlugins/PluginsManifest.cs

@@ -13,10 +13,10 @@ public static class PluginsManifest
         private static readonly string ClassName = nameof(PluginsManifest);
 
         private static readonly CommunityPluginStore mainPluginStore =
-            new("https://raw.githubusercontent.com/Flow-Launcher/Flow.Launcher.PluginsManifest/plugin_api_v2/plugins.json",
-                "https://fastly.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@plugin_api_v2/plugins.json",
-                "https://gcore.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@plugin_api_v2/plugins.json",
-                "https://cdn.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@plugin_api_v2/plugins.json");
+            new("https://raw.githubusercontent.com/Flow-Launcher/Flow.Launcher.PluginsManifest/main/plugins.json",
+                "https://fastly.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@main/plugins.json",
+                "https://gcore.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@main/plugins.json",
+                "https://cdn.jsdelivr.net/gh/Flow-Launcher/Flow.Launcher.PluginsManifest@main/plugins.json");
 
         private static readonly SemaphoreSlim manifestUpdateLock = new(1);