fix: checking if current worktree file changed

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/WorkingCopy.cs

@@ -807,7 +807,7 @@ private bool IsChanged(List<Models.Change> old, List<Models.Change> cur)
             {
                 var o = old[idx];
                 var c = cur[idx];
-                if (o.Path.Equals(c.Path, StringComparison.Ordinal) || o.Index != c.Index || o.WorkTree != c.WorkTree)
+                if (!o.Path.Equals(c.Path, StringComparison.Ordinal) || o.Index != c.Index || o.WorkTree != c.WorkTree)
                     return true;
             }