patch 8.2.3922: cannot build with dynamic Ruby 3.1

Problem:    Cannot build with dynamic Ruby 3.1.
Solution:   Add "_EXTRA" variables for CI.  Add missing functions. (Ozaki
            Kiichi, closes #9420)
diff --git a/src/version.c b/src/version.c
index 96359c1..6c8bced 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3922,
+/**/
     3921,
 /**/
     3920,