Fix javascript: URL evaluation origin variable

Although the variable is called initiatorOrigin at the call site, inside the "evaluate a javascript: URL" algorithm the parameter is actually named newDocumentOrigin, so that's the name that the algorithm should use.

Noticed in https://github.com/whatwg/html/pull/8447/files#r1067234151.

Author: domenic

source

@@ -90210,7 +90210,7 @@ location.href = '#foo';</code></pre>
      <dd><var>url</var></dd>
 
      <dt><span data-x="coop-enforcement-origin">origin</span></dt>
-     <dd><var>initiatorOrigin</var></dd>
+     <dd><var>newDocumentOrigin</var></dd>
 
      <dt><span data-x="coop-enforcement-coop">cross-origin opener policy</span></dt>
      <dd><var>coop</var></dd>
@@ -90232,7 +90232,7 @@ location.href = '#foo';</code></pre>
      <dd><var>response</var></dd>
 
      <dt><span data-x="navigation-params-origin">origin</span></dt>
-     <dd><var>initiatorOrigin</var></dd>
+     <dd><var>newDocumentOrigin</var></dd>
 
      <dt><span data-x="navigation-params-policy-container">policy container</span></dt>
      <dd><var>policyContainer</var></dd>