patch 9.0.0963: function name does not match autocmd event name

Problem:    Function name does not match autocmd event name.
Solution:   Rename "optionsset" to "optionset". (closes #11630)
diff --git a/src/version.c b/src/version.c
index c71f981..b51c904 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    963,
+/**/
     962,
 /**/
     961,