docs: update timezone picker reference (cotes2020#2518)

Author: kungfux

_config.yml

@@ -8,7 +8,7 @@ theme: jekyll-theme-chirpy
 # otherwise, the layout language will use the default value of 'en'.
 lang: en
 
-# Change to your timezone › https://kevinnovak.github.io/Time-Zone-Picker
+# Change to your timezone › https://zones.arilyn.cc
 timezone: Asia/Shanghai
 
 # jekyll-seo-tag settings › https://github.com/jekyll/jekyll-seo-tag/blob/master/docs/usage.md