Fixed link.
Fixes #7599: Improved print styles for a few key components

* Updates `.table` to always enforce a solid white background
* Update button groups and dropdowns to always use black carets
* Add a 1px solid black border to labels (in the future we should add a
border to these perhaps for better printing)
Merge pull request #8182 from karelvuong/3.0.0-wip

3.0.0-wip - Fixed 'Running Doc. Locally" Link
Add note about Jekyll version per #8195
Addresses #8199: darker default button
docs/javascript.html: backticks -> <code>
Merge pull request #8210 from cvrebert/backticks

docs/javascript.html: backticks -> <code>