task: use full task label to distinguish a terminal (#10469)

Spotted by @SomeoneToIgnore, in #10468 I've used a shortened task label,
which might lead to collisions.

Release Notes:

- N/A

crates/project/src/terminals.rs

@@ -52,6 +52,7 @@ impl Project {
             (
                 Some(TaskState {
                     id: spawn_task.id,
+                    full_label: spawn_task.full_label,
                     label: spawn_task.label,
                     status: TaskStatus::Running,
                     completion_rx,