fix typo: instect -> inspect (#537)

Author: ryo-gk

src/guide/a11y-semantics.md

@@ -159,7 +159,7 @@ Using [`aria-labelledby`](https://developer.mozilla.org/en-US/docs/Web/Accessibi
 </p>
 <script async src="https://static.codepen.io/assets/embed/ei.js"></script>
 
-You can see the description by instecting Chrome DevTools:
+You can see the description by inspecting Chrome DevTools:
 
 ![Chrome Developer Tools showing input accessible name from aria-labelledby and description with aria-describedby](/images/AccessibleARIAdescribedby.png)