docs: add fix for contextual menu not showing in Table example

[InnaAtanasova]

Related Issue

Part of #2045

Description

The contextual menus in Table example were not showing on button click. Updated the documentation to use onPopoverClick function

Please check whether the PR fulfills the following requirements

1. The output matches the design specs
   NA
2. The code follows fundamental-styles code standards and style
   NA
3. Testing

• [na] tested Storybook examples with "CSS Resources" normalize option
• [na] tested Storybook examples with "CSS Resources" unnormalize option
• Verified all styles in IE11
• Updated tests

4. Documentation

• Storybook documentation has been created/updated
• [na] Breaking Changes wiki has been updated in case of breaking changes.

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