fix(popovers): Add styling hooks table (#5170)

Author: Dottenpixel

ui/components/popovers/docs.mdx

@@ -362,3 +362,5 @@ Panel Popovers can be shown on mouse hover but for keyboard or screen reader use
   <p>For this particular use case, the <code>--slds-c-popover-position-zindex</code> <a href="/platforms/lightning/styling-hooks/">Styling Hook</a> allows developers to change the z-index value. <strong>Please note</strong>: when this value is changed, the responsibility is on the developer to maintain the CSS stacking order.</p>
 
 </Blockquote>
+
+<StylingHooksTable name="popovers" type="component" />