fix(styles): re-export type-classes

[jnm2377]

Ran into an issue migrating GTC where we needed a type mixin we forgot to re-export in the v11 styles package. This just adds it to the exports.

carbon/packages/type/scss/_classes.scss

Lines 15 to 21 in 63dbd53

	@mixin carbon--type-classes {
	// Font families
	@each $name, $value in $carbon--font-families {
	.#{$prefix}--type-#{$name} {
	font-family: $value;
	}
	}

internal slack thread for reviewers: https://ibm-studios.slack.com/archives/GCQ5R263T/p1642631874020800

Testing

• make sure CI passes as expected

[joshblack]

Hope you don't mind, tweaked the title from fix(@carbon/styles) to fix(styles)

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