util/log: use bright black rather than black for WLR_DEBUG
On some terminals under default settings, black is truly rendered as
`#000`, making it unreadable when the background is also black.
Refs swaywm/sway#5141.
@@ -17,7 +17,7 @@ static const char *verbosity_colors[] = {
[WLR_SILENT] = "",
[WLR_ERROR] = "\x1B[1;31m",
[WLR_INFO] = "\x1B[1;34m",
- [WLR_DEBUG] = "\x1B[1;30m",
+ [WLR_DEBUG] = "\x1B[1;90m",
};
static const char *verbosity_headers[] = {
