Embedder policy is now in policy container

See whatwg/html#6793.

Closes #1258.

Author: antosart

fetch.bs

@@ -3431,7 +3431,8 @@ Cross-Origin-Resource-Policy     = %s"same-origin" / %s"same-site" / %s"cross-or
  <li><p>Set <var>forNavigation</var> to false if it is not given.
 
  <li><p>Let <var>embedderPolicy</var> be <var>settingsObject</var>'s
- <a for="environment settings object">embedder policy</a>.
+ <a for="environment settings object">policy container</a>'s
+ <a for="policy container">embedder policy</a>.
 
  <li>
   <p>If the <a>cross-origin resource policy internal check</a> with <var>origin</var>,
@@ -3536,9 +3537,11 @@ run these steps:
 
 <ol>
  <li><p>Let <var>endpoint</var> be <var>settingsObject</var>'s
- <a for="environment settings object">embedder policy</a>'s
+ <a for="environment settings object">policy container</a>'s
+ <a for="policy container">embedder policy</a>'s
  <a for="embedder policy">report only reporting endpoint</a> if <var>reportOnly</var> is true and
- <var>settingsObject</var>'s <a for="environment settings object">embedder policy</a>'s
+ <var>settingsObject</var>'s <a for="environment settings object">policy container</a>'s
+ <a for="policy container">embedder policy</a>'s
  <a for="embedder policy">reporting endpoint</a> otherwise.
 
  <li><p>Let <var>serializedURL</var> be the result of