docs: Ask for cherry-picks to be made in order from newest to oldest releases

Author: dlipovetsky

contributors/devel/sig-release/cherry-picks.md

@@ -76,6 +76,8 @@ patch release branches.
 
 ## Initiate a Cherry Pick
 
+Note: Before initiating a cherry-pick to a release branch, first make sure that the fix is available in every _newer_ release branch. (For example, if the 1.27 is the most recent release branch, then, before cherry-picking to 1.25, first make sure the fix is already in 1.26, and 1.27). This helps prevent regressions as the result of an upgrade to the next release.
+
 - Run the [cherry pick script][cherry-pick-script]
 
   This example applies a master branch PR #98765 to the remote branch