Editorial: fix server-sent events intro variable names

Author: vrana

source

@@ -93620,7 +93620,7 @@ dictionary <dfn>EventSourceInit</dfn> {
     for connection requests to <var>url</var> to "<code data-x="">include</code>".</p>
    </dd>
 
-   <dt><var>socket</var> . <code subdfn data-x="dom-EventSource-close">close</code>()</dt>
+   <dt><var>source</var> . <code subdfn data-x="dom-EventSource-close">close</code>()</dt>
 
    <dd>
     <p>Aborts any instances of the <span data-x="concept-fetch">fetch</span> algorithm started for
@@ -93643,7 +93643,7 @@ dictionary <dfn>EventSourceInit</dfn> {
     event stream</span> is set to "<code data-x="">include</code>", and false otherwise.</p>
    </dd>
 
-   <dt><var>socket</var> . <code subdfn data-x="dom-EventSource-readyState">readyState</code></dt>
+   <dt><var>source</var> . <code subdfn data-x="dom-EventSource-readyState">readyState</code></dt>
 
    <dd>
     <p>Returns the state of this <code>EventSource</code> object's connection. It can have the
@@ -120915,6 +120915,7 @@ INSERT INTERFACES HERE
   Jacques Distler,
   Jake Archibald,
   Jake Verbaten,
+  Jakub Vrána,
   Jakub &#321;opusza&#324;ski,
   Jakub Wilk,
   James Craig,