Update references to new breakpoint tokens

[blackfalcon]

Is your feature request related to a problem? Please describe.

The following code is out of spec due to the newly created breakpoint tokens.

WebCoreStyleSheets/src/_breakpoints.scss

Lines 11 to 71 in ecc7ff4

	/// Standard breakpoint to support resolutions greater than 1232px.
	/// @example scss - import mixin file
	/// @import "./node_modules/@aurodesignsystem/webcorestylesheets/dist/breakpoints";
	/// @group responsive
	/// @example scss - Set breakpoint
	/// .foo {
	/// @include auro_breakpoint--lg {
	/// ...
	/// }
	/// }
	@mixin auro_breakpoint--lg {
	@media screen and (min-width: $auro-breakpoint-lg) {
	@content;
	}
	}
	/// Standard breakpoint to support resolutions greater than 1024px.
	/// @example scss - import mixin file
	/// @import "./node_modules/@aurodesignsystem/webcorestylesheets/dist/breakpoints";
	/// @group responsive
	/// @example scss - Set breakpoint
	/// .foo {
	/// @include auro_breakpoint--md {
	/// ...
	/// }
	/// }
	@mixin auro_breakpoint--md {
	@media screen and (min-width: $auro-breakpoint-md) {
	@content;
	}
	}
	/// Standard breakpoint to support resolutions greater than 660px.
	/// @example scss - import mixin file
	/// @import "./node_modules/@aurodesignsystem/webcorestylesheets/dist/breakpoints";
	/// @group responsive
	/// @example scss - Set breakpoint
	/// .foo {
	/// @include auro_breakpoint--sm {
	/// ...
	/// }
	/// }
	@mixin auro_breakpoint--sm {
	@media screen and (min-width: $auro-breakpoint-sm) {
	@content;
	}
	}
	/// Open format mixin to define any breakpoint.
	///
	/// See also: [Media_features](https://developer.mozilla.org/en-US/docs/Web/CSS/@media#Media_features)
	///
	/// Compatibility: [css-mediaqueries](https://caniuse.com/#feat=css-mediaqueries\)
	/// @example scss - import mixin file
	/// @import "./node_modules/@aurodesignsystem/webcorestylesheets/dist/breakpoints";
	/// @group responsive
	/// @example scss - Auro breakpoint tokens
	/// $auro-breakpoint-sm: 660px;
	/// $auro-breakpoint-md: 1024px;
	/// $auro-breakpoint-lg: 1232px;

Describe the solution you'd like

All relative code to breakpoints requires updates.

Relative information

See the following issue and linked PR

• Grid breakpoint update AuroDesignTokens#106

Exit criteria

This issue can be closed once all the breakpoint code and documentation in WCSS is updated to meet this new spec.