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/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 5259454..e0761c4 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -2353,6 +2353,7 @@
 	\ ]
   call writefile(lines, 'XtermPopup')
   let buf = RunVimInTerminal('-S XtermPopup', #{rows: 15})
+  call term_wait(buf, 100)
   call term_sendkeys(buf, ":\<CR>")
   call VerifyScreenDump(buf, 'Test_terminal_popup_1', {})
 
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,