style(rkj-repos): change `white` to `default` to support light color schemes (#6195)

Co-authored-by: Matthias Doering <matthias.doering@teamix.de>

themes/rkj-repos.zsh-theme

@@ -30,6 +30,6 @@ function mygit() {
 function retcode() {}
 
 # alternate prompt with git & hg
-PROMPT=$'%{$fg_bold[blue]%}┌─[%{$fg_bold[green]%}%n%b%{$fg[black]%}@%{$fg[cyan]%}%m%{$fg_bold[blue]%}]%{$reset_color%} - %{$fg_bold[blue]%}[%{$fg_bold[white]%}%~%{$fg_bold[blue]%}]%{$reset_color%} - %{$fg_bold[blue]%}[%b%{$fg[yellow]%}'%D{"%Y-%m-%d %I:%M:%S"}%b$'%{$fg_bold[blue]%}]
+PROMPT=$'%{$fg_bold[blue]%}┌─[%{$fg_bold[green]%}%n%b%{$fg[black]%}@%{$fg[cyan]%}%m%{$fg_bold[blue]%}]%{$reset_color%} - %{$fg_bold[blue]%}[%{$fg_bold[default]%}%~%{$fg_bold[blue]%}]%{$reset_color%} - %{$fg_bold[blue]%}[%b%{$fg[yellow]%}'%D{"%Y-%m-%d %I:%M:%S"}%b$'%{$fg_bold[blue]%}]
 %{$fg_bold[blue]%}└─[%{$fg_bold[magenta]%}%?$(retcode)%{$fg_bold[blue]%}] <$(mygit)$(hg_prompt_info)>%{$reset_color%} '
 PS2=$' \e[0;34m%}%B>%{\e[0m%}%b '