chore(deps): update dependency ember-cli to v6 #1564

Job	Run time
Install	36s
Lint	46s
Build Tests	1m 19s
Default Tests	49s
Floating Deps Test	1m 16s
Publish Docs to Cloudflare Pages	1m 38s
[email protected]	1m 21s
[email protected]	56s
Typecheck Docs	1m 6s
[email protected]	49s
${{ matrix.try-scenario }}	0s
Release	0s
Post Preview URL as comment to PR	1m 6s
	11m 42s

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