replace deprecated Sass @import rules with @use

_sass/jekyll-theme-minimalist.scss

@@ -1,6 +1,6 @@
-@import "fonts";
-@import "rouge-github";
-@import "colors";
+@use "fonts";
+@use "rouge-github";
+@use "colors";
 
 // default variables
 $section-width: 75% !default;

_sass/minimalist.scss

@@ -1,4 +1 @@
-// Placeholder file. If your site uses
-//     @import "{{ site.theme }}";
-// Then using this theme with jekyll-remote-theme will work fine.
-@import "jekyll-theme-minimalist";
+@use "jekyll-theme-minimalist";