fix "equivalent" typo (#4421)

Co-authored-by: Mike Gower <[email protected]>

Author: fstrr

techniques/general/G224.html

@@ -153,7 +153,7 @@ <h2>Tests</h2>
       <section class="procedure"><h3>Procedure for list example</h3>
          <ol>
             <li>Display the web page in a user agent where the page can be zoomed, or the user agent can be resized.</li>
-            <li>Zoom in or resize the browser window so that the viewport is equivallent to 320 CSS pixels wide.</li>
+            <li>Zoom in or resize the browser window so that the viewport is equivalent to 320 CSS pixels wide.</li>
             <li>The list content fits within the width so that it is only necessary so scroll vertically to read the list.</li>
             <li>Or, each nested list can be horizontally scrolled into view. Only vertical scrolling is necessary to read the content of list items within each specific nested list level.</li>
          </ol>
@@ -167,7 +167,7 @@ <h2>Tests</h2>
       <section class="procedure"><h3>Procedure for code snippets</h3>
          <ol>
             <li>Display the web page in a user agent where the page can be zoomed, or the user agent can be resized.</li>
-            <li>Zoom in or resize the browser window so that the viewport is equivallent to 320 CSS pixels wide.</li>
+            <li>Zoom in or resize the browser window so that the viewport is equivalent to 320 CSS pixels wide.</li>
             <li>The code snippets fits within the width so that it is only necessary so scroll vertically to read each line of code.</li>
             <li>Or, for code where non-wrapping lines are not essential, the code wraps or a mechanism is provided to allow line wrapping.</li>
             <li>Or, the indentation and linebreaks are meaningful to the code language.