Non-compliant ESM code references

[blackfalcon]

Please verify the version of auro-nav you have installed

@latest

Please describe the bug

See the following code

auro-nav/src/auro-nav.js

Lines 24 to 25 in 0ae9421

	import colorCss from "./color-css";
	import tokensCss from "./tokens-css";

Import endpoint does not have syntax prefix causing consumer's build to break.

Reproducing the error on the docsite

This issue cannot be reproduced on the Auro docsite

Expected behavior

Updated components should not break build pipelines.

What browsers are you seeing the problem on?

n/a

Additional context

n/a

Exit criteria

This issue can be closed once the incomplete code has been updated.