tools: bump too_long_line_length_table to 160, to avoid warnings for …

…just `v check-md doc/docs.md` (most common)

cmd/tools/vcheck-md.v

@@ -12,7 +12,7 @@ import regex
 
 const too_long_line_length_example = 120
 const too_long_line_length_codeblock = 120
-const too_long_line_length_table = 120
+const too_long_line_length_table = 160
 const too_long_line_length_link = 150
 const too_long_line_length_other = 100
 const term_colors = term.can_show_color_on_stderr()