Bump Selenium revision to include fix for "Get Element Text" atom (#1811)

In SeleniumHQ/selenium@33c6b78
the atom was fixed to correctly find capitalized text containing
and underscore.

Author: whimboo

index.html

@@ -11812,7 +11812,7 @@ <h2>Index</h2>
  <dt>Selenium
  <dd>The following functions are defined within
   the <a href=https://selenium.dev>Selenium</a> project, at
-  revision <code>21560a497470f0c769931c17fa9803c6cddf6f1c</code>.
+  revision <code>33c6b7841a59aaaad55744909c0600f066fd5593</code>.
   <ul>
     <!-- bot.dom.getVisibleText --> <li><dfn><a href=https://github.com/SeleniumHQ/selenium/blob/a6b161a159c3d581b130f03a2e6e35f577f38dec/javascript/atoms/dom.js#L1007><code>bot.dom.getVisibleText</code></a></dfn>
     <!-- bot.dom.isShown --> <li><dfn><a href=https://github.com/SeleniumHQ/selenium/blob/a6b161a159c3d581b130f03a2e6e35f577f38dec/javascript/atoms/dom.js#L573><code>bot.dom.isShown</code></a></dfn>