Link to task spec from progress

Author: LucaButBoring

docs/specification/draft/basic/utilities/progress.mdx

@@ -68,7 +68,7 @@ The receiver **MAY** then send progress notifications containing:
    - Send notifications at whatever frequency they deem appropriate
    - Omit the total value if unknown
 
-3. For task-augmented requests, the `progressToken` provided in the original request **MUST** continue to be used for progress notifications throughout the task's lifetime, even after the `CreateTaskResult` has been returned. The progress token remains valid and associated with the task until the task reaches a terminal status.
+3. For [task-augmented requests](./tasks), the `progressToken` provided in the original request **MUST** continue to be used for progress notifications throughout the task's lifetime, even after the `CreateTaskResult` has been returned. The progress token remains valid and associated with the task until the task reaches a terminal status.
    - Progress notifications for tasks **MUST** use the same `progressToken` that was provided in the initial task-augmented request
    - Progress notifications for tasks **MUST** stop after the task reaches a terminal status (`completed`, `failed`, or `cancelled`)