chore: bump version to 5.5.1 and update dependencies

- Upgrade version from 5.5.0 to 5.5.1
- Update third-party dependencies: algolia, disqusjs, docsearch, fancybox, fontawesome, mermaid
- Replace Twitter with X in share configurations
- Enable CDN version numbers by default
- Fix shuoshuo page JSON security with safeJSON helper
- Improve image lazy loading regex to handle minified HTML
- Fix search result HTML structure and styling
- Add margin-top to search result numbering for better alignment

_config.yml

@@ -515,12 +515,12 @@ share:
   # Share.js
   # https://github.com/overtrue/share.js
   sharejs:
-    sites: facebook,twitter,wechat,weibo,qq
+    sites: facebook,x,wechat,weibo,qq
 
   # AddToAny
   # https://www.addtoany.com/
   addtoany:
-    item: facebook,twitter,wechat,sina_weibo,facebook_messenger,email,copy_link
+    item: facebook,x,wechat,sina_weibo,facebook_messenger,email,copy_link
 
 # --------------------------------------
 # Comments System
@@ -1067,7 +1067,7 @@ CDN:
   third_party_provider: jsdelivr
 
   # Add version number to url, true or false
-  version: false
+  version: true
 
   # Custom format
   # For example: https://cdn.staticfile.org/${cdnjs_name}/${version}/${min_cdnjs_file}