chore: add html highlights

[mikesmithgh]

-- html htmlTag = { link = "GruvboxAquaBold" }, htmlEndTag = { link = "GruvboxAquaBold" }, htmlTagName = { link = "GruvboxBlue" }, htmlArg = { link = "GruvboxOrange" }, htmlTagN = { link = "GruvboxFg1" }, htmlSpecialTagName = { link = "GruvboxBlue" }, htmlLink = { fg = colors.fg4, underline = config.underline }, htmlSpecialChar = { link = "GruvboxRed" }, htmlBold = { fg = colors.fg0, bg = colors.bg0, bold = config.bold }, htmlBoldUnderline = { fg = colors.fg0, bg = colors.bg0, bold = config.bold, underline = config.underline }, htmlBoldItalic = { fg = colors.fg0, bg = colors.bg0, bold = config.bold, italic = config.italic }, htmlBoldUnderlineItalic = { fg = colors.fg0, bg = colors.bg0, bold = config.bold, italic = config.italic, underline = config.underline, }, htmlUnderline = { fg = colors.fg0, bg = colors.bg0, underline = config.underline }, htmlUnderlineItalic = { fg = colors.fg0, bg = colors.bg0, italic = config.italic, underline = config.underline, }, htmlItalic = { fg = colors.fg0, bg = colors.bg0, bold = config.italic },