patch 8.1.1793: mixed comment style in globals

Problem:    Mixed comment style in globals.
Solution:   Use // comments where appropriate.
diff --git a/src/version.c b/src/version.c
index a12b4e8..653ed83 100644
--- a/src/version.c
+++ b/src/version.c
@@ -774,6 +774,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1793,
+/**/
     1792,
 /**/
     1791,