https-ify sass-lang.com urls

See sass/sass-site#217

Committed via https://github.com/asottile/all-repos

Author: asottile

CODE_OF_CONDUCT.md

@@ -7,4 +7,4 @@ fair place to play.
 
 [The full community guidelines can be found on the Sass website.][link]
 
-[link]: http://sass-lang.com/community-guidelines
+[link]: https://sass-lang.com/community-guidelines

lib/rails/generators/sass/assets/templates/stylesheet.sass

@@ -1,3 +1,3 @@
 // Place all the styles related to the <%= name %> controller here.
 // They will automatically be included in application.css.
-// You can use Sass here: http://sass-lang.com/
+// You can use Sass here: https://sass-lang.com/

lib/rails/generators/scss/assets/templates/stylesheet.scss

@@ -1,3 +1,3 @@
 // Place all the styles related to the <%= name %> controller here.
 // They will automatically be included in application.css.
-// You can use Sass (SCSS) here: http://sass-lang.com/
+// You can use Sass (SCSS) here: https://sass-lang.com/