submodule: update handbook - add release troubleshooting section

Guo-Zhang · Guo-Zhang · commit 21131ff95e8e · 2026-04-08T20:59:09.000+08:00
diff --git a/docs/handbook b/docs/handbook
@@ -1 +1 @@
-Subproject commit f598e93397278f0b729309f4e91ef6566fe1ea6b
+Subproject commit fc0e190bad954e7607ffb4ff090fb3fbf696cd72
