Table: Row Action Column Accessibility issues

[ElishaSamPeterPrabhu]

Description

• Added a title to the row actions column header.
• Replaced the cancel icon in the row actions with the cancel_circle icon.

References Fixes #2886

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation update

How Has This Been Tested?

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

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[coliff]

compared: https://deploy-preview-2887--moduswebcomponents.netlify.app/?path=/story/components-table--row-actions to: https://moduswebcomponents.netlify.app/?path=/story/components-table--row-actions

Fix looks good!

[prashanth-offcl]

This PR will have to wait until #2874 is merged.