updated for version 7.3.894

Problem:    Using wrong RUBY_VER causing Ruby build to break.
Solution:   Correct the RUBY_VER value. (Yongwei Wu)

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    894,
 /**/
     893,
 /**/