docs: update examples (#58)

Yaml parser will interpret '*' as a special syntax and produce this error:
hexojs · Mar 13, 2022 · 9cc9489 · 9cc9489
1 parent 9301a58
commit 9cc9489
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -15,7 +15,7 @@ $ npm install hexo-clean-css --save
 ``` yaml
 clean_css:
   exclude: 
-    - *.min.css
+    - '*.min.css'
 ```
 
 - **exclude**: Exclude files