Update index.html

Co-authored-by: James Nurthen <[email protected]>

index.html

@@ -11709,7 +11709,7 @@ <h4 id=att-high>`high`</h4>
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       <th><a href="https://developer.apple.com/reference/appkit/nsaccessibility">AX</a></th>
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-        <div class="general">Expose "optimal value" via `AXValueDescription` if &lt;value&gt; is greater than or equal to &lt;high&gt;. Expose "suboptial value" if &lt;value&gt; is less than &lt;high&gt; and greater than or equal to &lt;low&gt;.</div>
+        <div class="general">Expose "optimal value" via `AXValueDescription` if &lt;value&gt; is greater than or equal to &lt;high&gt;. Expose "suboptimal value" if &lt;value&gt; is less than &lt;high&gt; and greater than or equal to &lt;low&gt;.</div>
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