PluginsManager: fix "new issue" URL for some plugins

since the `UrlSourceCode` field is inconsistent in the manifest file

Author: JohnTheGr8

Plugins/Flow.Launcher.Plugin.PluginsManager/ContextMenu.cs

@@ -2,7 +2,7 @@
 using Flow.Launcher.Infrastructure.UserSettings;
 using System;
 using System.Collections.Generic;
-using System.Text;
+using System.Text.RegularExpressions;
 
 namespace Flow.Launcher.Plugin.PluginsManager
 {
@@ -53,8 +53,8 @@ public List<Result> LoadContextMenus(Result selectedResult)
                     {
                         // standard UrlSourceCode format in PluginsManifest's plugins.json file: https://github.com/jjw24/Flow.Launcher.Plugin.Putty/tree/master
                         var link = pluginManifestInfo.UrlSourceCode.StartsWith("https://github.com") 
-                                                                ? pluginManifestInfo.UrlSourceCode.Replace("/tree/master", "/issues/new/choose") 
-                                                                : pluginManifestInfo.UrlSourceCode;
+                                        ? Regex.Replace(pluginManifestInfo.UrlSourceCode, @"\/tree\/\w+$", "") + "/issues/new/choose"
+                                        : pluginManifestInfo.UrlSourceCode;
 
                         Context.API.OpenUrl(link);
                         return true;