fix: content shifting when the copy button appears

[DarthGigi]

I noticed that when any framework is selected the "Share" button appears. Since that button has a padding of py-1.5 and the GitHub button has a padding of py-1, it is slightly larger than the GitHub button which is causing the Header/nav to expand in height by a few pixels; causing a layout shift:

Screenshot.2024-05-01.at.5.46.36.mp4

Just changing the share button's padding to py-1 fixes the shifting, however, in my opinion it looks a bit off next to the GitHub button:

Because as you can see, the share button is slightly smaller than the GitHub button since it doesn't have a border:

So I've changed the styling to include a border and also match the framework buttons, hopefully that's ok:

As you can see, the shifting is gone after these changes:

Screenshot.2024-05-01.at.6.21.39.mp4

[matschik]

Amazing ! Thanks a lot for the before/after videos and your complete explanations.
Let's merge !