patch 8.2.0266: terminal in popup test sometimes fails on Mac

Problem:    Terminal in popup test sometimes fails on Mac.
Solution:   Add a short delay.
diff --git a/src/version.c b/src/version.c
index da0b2f6..67e23d5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    266,
+/**/
     265,
 /**/
     264,