[css-ruby-1] update DoC

Author: fantasai

css-ruby-1/issues-wd-2020.bsi

@@ -406,6 +406,7 @@ From:     Xidorn Quan
 Comment:  https://lists.w3.org/Archives/Public/www-style/2015Feb/0096.html
 From:     Patrick Dark
 Comment:  https://lists.w3.org/Archives/Public/www-style/2016Dec/0106.html
+Comment:  https://github.com/w3c/csswg-drafts/issues/6106
 Open
 ----
 Issue 50.

css-ruby-1/issues-wd-2020.html

@@ -444,6 +444,7 @@ <h1>CSS Ruby Layout Level 3 Disposition of Comments for 2020-04-29 WD</h1>
 <span>Comment:  <a href='https://lists.w3.org/Archives/Public/www-style/2015Feb/0096.html'>https://lists.w3.org/Archives/Public/www-style/2015Feb/0096.html</a> <a href="https://www.w3.org/Mail/flatten/index?subject=https%3A%2F%2Flists.w3.org%2FArchives%2FPublic%2Fwww-style/2015Feb/0096.html"><abbr title="Thread">&#x2208;</abbr></a></span>
 <span>From:     Patrick Dark</span>
 <span>Comment:  <a href='https://lists.w3.org/Archives/Public/www-style/2016Dec/0106.html'>https://lists.w3.org/Archives/Public/www-style/2016Dec/0106.html</a> <a href="https://www.w3.org/Mail/flatten/index?subject=https%3A%2F%2Flists.w3.org%2FArchives%2FPublic%2Fwww-style/2016Dec/0106.html"><abbr title="Thread">&#x2208;</abbr></a></span>
+<span>Comment:  <a href='https://github.com/w3c/csswg-drafts/issues/6106'>https://github.com/w3c/csswg-drafts/issues/6106</a></span>
 <span>Open</span></pre>
 <pre class=' a' id='issue-50'>
 <span>Issue 50. <a href='#issue-50'>#</a></span>