patch 8.2.1693: "hi def" does not work for cleared highlight

Problem:    "hi def" does not work for cleared highlight.
Solution:   Check the "sg_cleared" flag. (Maxim Kim, closes #6956,
            closes #4405)
diff --git a/src/version.c b/src/version.c
index d1ce8f0..dab2bd8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1693,
+/**/
     1692,
 /**/
     1691,