Update Folders.cs (#1081)

Fix resolution of SteamLibrary path in libraryfolders.vdf

Dotnet/AppApi/Electron/Folders.cs

@@ -50,9 +50,9 @@ namespace VRCX
             if (!File.Exists(libraryFoldersVdfPath))
                 return null;
 
+            string? libraryPath = null;
             foreach (var line in File.ReadLines(libraryFoldersVdfPath))
             {                
-                string? libraryPath = null;
                 // Assumes line will be \t\t"path"\t\t"pathToLibrary"
                 if (line.Contains("\"path\""))
                 {