Use HTTPS for Planet Argon links (ohmyzsh#6326)

README.md

@@ -226,14 +226,14 @@ We're on the social media.
 
 ## Merchandise
 
-We have [stickers](http://shop.planetargon.com/products/ohmyzsh-stickers-set-of-3-stickers) and [shirts](http://shop.planetargon.com/products/ohmyzsh-t-shirts) for you to show off your love of Oh My Zsh. Again, this will help you become the talk of the town!
+We have [stickers](https://shop.planetargon.com/products/ohmyzsh-stickers-set-of-3-stickers) and [shirts](http://shop.planetargon.com/products/ohmyzsh-t-shirts) for you to show off your love of Oh My Zsh. Again, this will help you become the talk of the town!
 
 ## License
 
 Oh My Zsh is released under the [MIT license](LICENSE.txt).
 
 ## About Planet Argon
 
-![Planet Argon](http://pa-github-assets.s3.amazonaws.com/PARGON_logo_digital_COL-small.jpg)
+![Planet Argon](https://pa-github-assets.s3.amazonaws.com/PARGON_logo_digital_COL-small.jpg)
 
 Oh My Zsh was started by the team at [Planet Argon](https://www.planetargon.com/?utm_source=github), a [Ruby on Rails development agency](https://www.planetargon.com/skills/ruby-on-rails-development?utm_source=github).

tools/install.sh

@@ -107,7 +107,7 @@ main() {
   echo ''
   echo 'p.s. Follow us at https://twitter.com/ohmyzsh.'
   echo ''
-  echo 'p.p.s. Get stickers and t-shirts at http://shop.planetargon.com.'
+  echo 'p.p.s. Get stickers and t-shirts at https://shop.planetargon.com.'
   echo ''
   printf "${NORMAL}"
   env zsh

tools/upgrade.sh

@@ -33,7 +33,7 @@ then
   printf '%s\n' '                        /____/                       '
   printf "${BLUE}%s\n" "Hooray! Oh My Zsh has been updated and/or is at the current version."
   printf "${BLUE}${BOLD}%s${NORMAL}\n" "To keep up on the latest news and updates, follow us on twitter: https://twitter.com/ohmyzsh"
-  printf "${BLUE}${BOLD}%s${NORMAL}\n" "Get your Oh My Zsh swag at:  http://shop.planetargon.com/"
+  printf "${BLUE}${BOLD}%s${NORMAL}\n" "Get your Oh My Zsh swag at:  https://shop.planetargon.com/"
 else
   printf "${RED}%s${NORMAL}\n" 'There was an error updating. Try again later?'
 fi