Update 8 files

- /_layouts/default.html
- /_includes/live2d.html
- /rss.xml
- /search.json
- /opensearch.xml
- /index.html
- /feed.json
- /404.md

search.json

@@ -1,3 +1,4 @@
 ---
 ---
+
 [{% for post in site.posts %}{% unless post.layout == "encrypt" %}{ "title": "{{ post.title | escape }}", "category": "{{ post.category }}", "tags": "{{ post.tags | join: ', ' }}", "url": "{{ site.baseurl }}{{ post.url }}", "date": "{{ post.date | date: "%Y/%m/%d" }}", "content": {{ post.content | strip_html | strip_newlines | jsonify }} }{% unless forloop.last %},{% endunless %}{% endunless %}{% endfor %}]