Updated colour of ◀ in PROMPT2 of the avit theme.

In commit 729fd53 I incorrectly only changed PROMPT1. Now both ▶ and ◀ follow $CARETCOLOR.

themes/avit.zsh-theme

@@ -4,7 +4,7 @@ PROMPT='
 $(_user_host)$(_current_dir) $(git_prompt_info) $(_ruby_version)
 %{$fg[$CARETCOLOR]%}▶%{$resetcolor%} '
 
-PROMPT2='%{$fg[grey]%}◀%{$reset_color%} '
+PROMPT2='%{$fg[$CARETCOLOR]%}◀%{$reset_color%} '
 
 RPROMPT='$(_vi_status)%{$(echotc UP 1)%}$(_git_time_since_commit) $(git_prompt_status) ${_return_status}%{$(echotc DO 1)%}'