updating installer data

Author: norbusan

tlpkg/installer/ctan-mirrors.pl

@@ -40,6 +40,7 @@
       'http://ctan.asis.ai/' => 1,
     },
     'Japan' => {
+      'https://ftp.jaist.ac.jp/pub/CTAN/' => 1,
       'https://ftp.kddilabs.jp/CTAN/' => 1,
       'https://ftp.yz.yamagata-u.ac.jp/pub/CTAN/' => 1,
       'https://jp.mirrors.cicku.me/ctan/' => 1,