mm/damon/Kconfig: update DAMON doc URL

The old URL doesn't really work anymore and as the documentation has been
integrated in the main kernel documentation site, change the URL to point
to that.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Diederik de Haas <[email protected]>
Reviewed-by: SeongJae Park <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: diederikdehaas

mm/damon/Kconfig

@@ -9,7 +9,7 @@ config DAMON
 	  access frequency of each memory region. The information can be useful
 	  for performance-centric DRAM level memory management.
 
-	  See https://damonitor.github.io/doc/html/latest-damon/index.html for
+	  See https://www.kernel.org/doc/html/latest/mm/damon/index.html for
 	  more information.
 
 config DAMON_KUNIT_TEST