Apply suggestions from code review

Co-authored-by: Henrik Skupin <mail@hskupin.info>

Author: sadym-chromium

index.html

@@ -1705,8 +1705,8 @@ <h3>Proxy</h3>
 </pre>
 
 <p>A <a>proxy per protocol specifiers</a> is considered to be a
- <dfn>valid proxy per protocol specifiers</dfn>, if each of it's
- <a>own property</a> is a non-empty <a>String</a>, and each of it's keys is a
+ <dfn>valid proxy per protocol specifiers</dfn>, if each of its
+ <a>own property</a> is a non-empty <a>String</a>, and each of its keys is a
  <a>valid proxy specifier</a>.
 
 <p>A <dfn>proxy specifier</dfn> is a JSON <a>Object</a> with the following keys: