patch 8.0.0831: with 8 colors the bold attribute is not set properly

Problem:    With 8 colors the bold attribute is not set properly.
Solution:   Move setting HL_TABLE() out of lookup_color. (closes #1901)
diff --git a/src/version.c b/src/version.c
index 02d43b6..71ee6d2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    831,
+/**/
     830,
 /**/
     829,