theme: everblush (#10394)

changed the statusline colors for SELECT mode
  the previous colours seem to be incorrect and quite ugly (sorry).
  I chose the magenta over the cyan that (colors that were already present) as it has
  more contrast with the existing INSERT colour.
  the statusline colours are now inline with eachother, all having the background be the 'background'
  colour, with varying foregrounds.

Co-authored-by: urly3 <u@rl.yyy>

runtime/themes/everblush.toml

@@ -61,7 +61,7 @@
 "ui.statusline.inactive" = { fg = "foreground", bg = "background" }
 "ui.statusline.normal" = { fg = "white", bg = "background" }
 "ui.statusline.insert" = { fg = "blue", bg = "background" }
-"ui.statusline.select" = { fg = "cyan", bg = "magenta" }
+"ui.statusline.select" = { fg = "magenta", bg = "background" }
 "ui.text" = { fg = "foreground" }
 "ui.text.focus" = { fg = "blue" }
 "ui.virtual.ruler" = { bg = "cursorline" }