chore(deps): update dependency ember-cli to v6 #1191

Job	Run time
Install	41s
Lint	44s
Build Tests	56s
[email protected]	1m 38s
[email protected]	57s
[email protected]	1m 40s
Default Tests	52s
Typecheck Docs	1m 17s
Floating Deps Test	1m 13s
Publish Docs to Cloudflare Pages	2m 20s
${{ matrix.try-scenario }}	0s
Release	0s
Post Preview URL as comment to PR	1m 4s
	13m 22s

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