patch 9.0.0969: matchparen highlight is not updated when switching buffers

Problem:    Matchparen highlight is not updated when switching buffers.
Solution:   Listen to the BufLeave and the BufWinEnter autocmd events.
            (closes #11626)
diff --git a/src/version.c b/src/version.c
index f26f91a..78df0d8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    969,
+/**/
     968,
 /**/
     967,