Bikeshed update for 'Move Mantaroh to former editors' [ci skip]

Generated from:

commit 84351d1
Author: Brian Birtles <birtles@gmail.com>
Date:   Thu Nov 22 16:21:44 2018 +0900

    Move Mantaroh to former editors

Author: birtles

index.html

@@ -11,7 +11,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2016/W3C-UD" rel="stylesheet" type="text/css">
   <meta content="Bikeshed version 0da7328bb90ef81993146377e4e0fed236969c4c" name="generator">
   <link href="https://wicg.github.io/scroll-animations/" rel="canonical">
-  <meta content="77803dcc67881b47bb46abbd1a4b34f0d72b431f" name="document-revision">
+  <meta content="84351d173ed9e418a18a94c327eb4c96258f77e4" name="document-revision">
   <link href="web-animations.css" rel="stylesheet" type="text/css">
 <style>/* style-md-lists */
 
@@ -259,17 +259,18 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2016/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Scroll-linked Animations</h1>
-   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Unofficial Proposal Draft, <time class="dt-updated" datetime="2018-11-21">21 November 2018</time></span></h2>
+   <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Unofficial Proposal Draft, <time class="dt-updated" datetime="2018-11-22">22 November 2018</time></span></h2>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
      <dd><a class="u-url" href="https://wicg.github.io/scroll-animations/">https://wicg.github.io/scroll-animations/</a>
      <dt class="editor">Editors:
      <dd class="editor p-author h-card vcard"><span class="p-name fn">Brian Birtles &lt;bbirtles@mozilla.com></span>
      <dd class="editor p-author h-card vcard"><span class="p-name fn">Botond Ballo &lt;botond@mozilla.com></span>
-     <dd class="editor p-author h-card vcard"><span class="p-name fn">Mantaroh Yoshinaga &lt;mantaroh@mozilla.com></span>
      <dd class="editor p-author h-card vcard"><span class="p-name fn">Stephen McGruer &lt;smcgruer@google.com></span>
      <dd class="editor p-author h-card vcard"><span class="p-name fn">Antoine Quint &lt;graouts@apple.com></span>
+     <dt class="editor">Former Editor:
+     <dd class="editor p-author h-card vcard"><span class="p-name fn">Mantaroh Yoshinaga</span>
      <dt>Suggest an Edit for this Spec:
      <dd><a href="https://github.com/w3c/csswg-drafts/blob/master/scroll-animations/Overview.bs">GitHub Editor</a>
      <dt>Issue Tracking: