patch 8.1.2302: :lockmarks does not work for '[ and ']

Problem:    :lockmarks does not work for '[ and '].
Solution:   save and restore '[ and '] marks. (James McCoy, closes #5222)
diff --git a/src/version.c b/src/version.c
index b916434..500ec91 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2302,
+/**/
     2301,
 /**/
     2300,