[Modification] - Reduce line height of some type styles

[alexcanning]

Type of request
Modification

Component, pattern, template, helper or foundation?
Foundation

Nature of request
The current type styles lg-font-size-5, lg-font-size-6 and lg-font-size-7 have been found to have line heights that are too spacious. I would like the following style's line heights reduced accordingly:

Style name	Type size (LG)	New line height (LG)	Type size (SM)	New line height (SM)
lg-font-size-7	56	68	52	64
lg-font-size-6	48	60	44	56
lg-font-size-5	40	52	36	48

These new properties have been tested and refined by the L&G D&E design team.

Assume this would be a breaking change.

[elenagarrone]

PR here: #1222

[elenagarrone]

The change is now into the next branch.