Fix DxcLink border radius

[Mil4n0r]

Checklist
(Check off all the items before submitting)

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Description
For consistency purposes, the border-radius of the Link component is 2px and we want to update it to 4px. This is its value in most of our components.

Additional context
Even though it was listed as 2px, the images used were using border-radius: 4px internally. That is why it is only required to change the first image in the Specifications tab.

Closes #1719

[Mil4n0r]

I have yet to ask for the specs image with the 2px padding added.

[Mil4n0r]

All images have been updated.

[GomezIvann]

One comment, comparing the component with the designs and the specs images I still think the component is too tall. Maybe we need to adjust this by updating the line-height, what do you think? Maybe we need Lara or Irene's help.

[Mil4n0r]

One comment, comparing the component with the designs and the specs images I still think the component is too tall. Maybe we need to adjust this by updating the line-height, what do you think? Maybe we need Lara or Irene's help.

I missed that, but I agree with you that it is too tall. Using 100% line-height for the anchor seems to look just like in the images.