Fix focus to group when already existing group

src/main.rs

@@ -430,7 +430,8 @@ fn focus_to_group(stream: &UnixStream, group_index: usize) {
                         .enumerate()
                         .find(|i| i.1.name == other_workspace.output)
                         .unwrap()
-                        .0,
+                        .0
+                        + 1,
                 ),
                 None => {
                     // Or if the targeted output is currently connected