patch 8.2.2235: build failure with some Ruby versions

Problem:    Build failure with some Ruby versions.
Solution:   Adjust the code for Ruby 3.0. (Ozaki Kiichi, closes #7564)
diff --git a/src/version.c b/src/version.c
index 4dfa987..f6c1bf2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2235,
+/**/
     2234,
 /**/
     2233,