Specification table has no border radius

[rakleed]

It would be nice if the table with specifications (#specifications .standard-table) had a border radius like other similar elements:

• .interactive
• .section-content pre
• .section-content .code-example pre
• .sample-code-frame
• .bc-table
• .metadata

[bsmth]

This is a duplicate of https://github.com/orgs/mdn/discussions/301 so I'm going to close in favor of that one. Thank you :)