refactor: uniform block border radius

scope:
- categories
- posts (prompt, code snippets)

_sass/jekyll-theme-chirpy.scss

@@ -6,19 +6,16 @@
  * MIT Licensed
  */
 
-@import
-  "colors/light-typography",
-  "colors/dark-typography",
-
-  "addon/variables",
-  "variables-hook",
-  "addon/module",
-  "addon/syntax",
-  "addon/commons",
-
-  "layout/home",
-  "layout/post",
-  "layout/tags",
-  "layout/archives",
-  "layout/categories",
-  "layout/category-tag";
+@import 'colors/light-typography';
+@import 'colors/dark-typography';
+@import 'addon/variables';
+@import 'variables-hook';
+@import 'addon/module';
+@import 'addon/syntax';
+@import 'addon/commons';
+@import 'layout/home';
+@import 'layout/post';
+@import 'layout/tags';
+@import 'layout/archives';
+@import 'layout/categories';
+@import 'layout/category-tag';