A reference to printk-formats.txt didn't get updated when the file moved;
fix that.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* - ``%n`` is unsupported
* - ``%p*`` is handled by pointer()
*
- * See pointer() or Documentation/printk-formats.txt for more
+ * See pointer() or Documentation/core-api/printk-formats.rst for more
* extensive description.
*
* **Please update the documentation in both places when making changes**