Update man page

Author: junegunn

man/man1/fzf.1

@@ -228,6 +228,10 @@ Draw border around the finder
 .br
 .BR double "        Border with double lines"
 .br
+.BR block "         Border using block elements; suitable when using different background color"
+.br
+.BR thinblock "     Border using legacy computing symbols; may not be displayed on some terminals"
+.br
 .BR horizontal "    Horizontal lines above and below the finder"
 .br
 .BR vertical "      Vertical lines on each side of the finder"
@@ -599,6 +603,10 @@ Should be used with one of the following \fB--preview-window\fR options.
 .br
 .B * border-double
 .br
+.B * border-block
+.br
+.B * border-thinblock
+.br
 .B * border-horizontal
 .br
 .B * border-top