patch 8.2.2122: Vim9: crash when sourcing vim9script early

Problem:    Vim9: crash when sourcing vim9script early.
Solution:   Use set_option_value() instead of setting p_cpo directly.
            (closes #7441)
diff --git a/src/version.c b/src/version.c
index 9bb587d..8eec20e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2122,
+/**/
     2121,
 /**/
     2120,