[Refactor] Update Task.Run usage to await and discard returned tasks.

Fixes some race conditions.

RomRepoMgr.Core/Filesystem/Vfs.cs

@@ -59,7 +59,7 @@ public class Vfs : IDisposable
                 MountPoint = mountPoint
             };
 
-            Task.Run(() =>
+            _ = Task.Run(() =>
             {
                 _fuse.Start();