testdata/issues: fix indentation

Author: ydnar

testdata/issues/issue325.wit

@@ -2,8 +2,8 @@ package issues:issue325;
 
 world w {
 	@unstable(feature = active)
-    include issues:dep1/w@0.1.0;
-    include issues:unstable/w@0.1.0;
+	include issues:dep1/w@0.1.0;
+	include issues:unstable/w@0.1.0;
 }
 
 package issues:unstable@0.1.0 {