af-magic: fix showing aws prompt out of the box (#8243)

Fix issue related to #7615, #7747 and #6346

After the update, aws prompt (which should be visible out of the box) disappears when a user uses a theme af-magic, because of fact that plugins are loaded before themes.
This pull request fixes issue with not showing aws prompt in theme af-magic, by appending RPROMPT in theme af-magic instead overwriting.

.github/workflows/main.yml

@@ -1,4 +1,4 @@
-name: Check Suite
+name: CI
 on:
   pull_request:
     types:

README.md

@@ -14,7 +14,7 @@ Finally, you'll begin to get the sort of attention that you have always felt you
 
 To learn more, visit [ohmyz.sh](https://ohmyz.sh), follow [@ohmyzsh](https://twitter.com/ohmyzsh) on Twitter, and/or join us on Discord.
 
-![Check Suite](https://github.com/ohmyzsh/ohmyzsh/workflows/Check%20Suite/badge.svg)
+[![CI](https://github.com/ohmyzsh/ohmyzsh/workflows/CI/badge.svg)](https://github.com/ohmyzsh/ohmyzsh/actions?query=workflow%3ACI)
 [![Follow @ohmyzsh](https://img.shields.io/twitter/follow/ohmyzsh?label=Follow+@ohmyzsh&style=flat)](https://twitter.com/intent/follow?screen_name=ohmyzsh)
 [![Discord server](https://img.shields.io/discord/642496866407284746)](https://discord.gg/bpXWhnN)
 

themes/af-magic.zsh-theme

@@ -21,9 +21,9 @@ eval my_orange='$FG[214]'
 # right prompt
 if type "virtualenv_prompt_info" > /dev/null
 then
-	RPROMPT='$FG[078]$(virtualenv_prompt_info)%{$reset_color%} $my_gray%n@%m%{$reset_color%}%'
+	RPROMPT="${RPROMPT}"'$FG[078]$(virtualenv_prompt_info)%{$reset_color%} $my_gray%n@%m%{$reset_color%}%'
 else
-	RPROMPT='$my_gray%n@%m%{$reset_color%}%'
+	RPROMPT="${RPROMPT}"'$my_gray%n@%m%{$reset_color%}%'
 fi
 
 # git settings