todo: move previous write-only monitoring patch url

Signed-off-by: SeongJae Park <sj@kernel.org>
diff --git a/todo b/todo
index 513e735..8358dfc 100644
--- a/todo
+++ b/todo
@@ -18,6 +18,10 @@
     - connect with virtio-balloon
 - Documentation cleanup: Make link from design to API, usage
 - write-only monitoring
+  - There is a patch doing the work already:
+    https://lore.kernel.org/lkml/20220203131237.298090-1-pedrodemargomes@gmail.com/
+  Need to wait until soft-dirty bugs are fixed, though.
+
 - Selftests: Test DAMOS tried_regions
 
 Planning / Considering
@@ -57,9 +61,6 @@
 - let kdamond name be user-defined
 - let DAMON modules share one kdamond
 - unify DAMON modules
-  - There is a patch doing the work already:
-    https://lore.kernel.org/lkml/20220203131237.298090-1-pedrodemargomes@gmail.com/
-  Need to wait until soft-dirty bugs are fixed, though.
 - support multiple contexts per kdamond
 - DAMON-based VMA split/merge
   - Help big VMA contention issue?