fixed changes in #154

[avih7531]

See #154

changes:

• fixed linking of html tags to markdown
• default markdown header bolding
• changed RenderMarkdownHx mix color to C.bg
• changed RenderMarkdownHx alpha to 0.15

left to do:

• decide to keep colored bolds, italics, and emphasis in non-rendered and/or rendered mode @AlexvZyl

[avih7531]

Obligatory screenshot:

P.S. would anyone like the waybar and/or wallpaper? Both my making all in the Nordic colorscheme

[5-pebbles]

This does not need a separate PR; when you push changes to avih7531:main they will also appear in the already open PR. GitHub may have prompted you to open a new one because I changed the merge target to AlexvZyl:dev but I am going to close this and ask that you add this PR's comments to the old one.