fix(styles): update border-block-end to use $border-subtle-01

[ziyadzulfikar]

Closes #17454

Updated the border-block-end of each element in the table rows.

Changelog

Changed

• Changed border-block-end: 1px solid $border-subtle; to border-block-end: 1px solid $border-subtle-01;

Testing / Reviewing

• Navigate to the DataTable component's playground story.

• Review the styling of the <td> elements in the table rows that use the border-block-end property, and ensure the values are applied correctly and consistently.

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[ziyadzulfikar]

I have read the DCO document and I hereby sign the DCO.