drivers: video: Update migration-guide

Rename the config CONFIG_VIDEO_HIMAX_HM01B0
to CONFIG_VIDEO_HM01B0

Signed-off-by: Kurt Eckhardt <kurte@rockisland.com>

Author: KurtE

doc/releases/migration-guide-4.4.rst

@@ -113,6 +113,14 @@ Networking
   code cannot use POSIX APIs, then the relevant network API prefix needs to be added to the
   code calling a network API.
 
+Video
+*****
+
+* hm01b0
+
+  * CONFIG_VIDEO_HIMAX_HM01B0
+    renamed to CONFIG_VIDEO_HM01B0
+
 Other subsystems
 ****************