chore(deps): update testing dependencies #5911

Job	Run time
Install	21s
Publish Docs to Cloudflare Pages	1m 14s
Default Tests	48s
Lint	41s
Floating Deps Test	1m 2s
[email protected]	36s
[email protected]	44s
[email protected]	36s
[email protected]	37s
ember-lts-4.4	51s
ember-lts-4.8	50s
ember-release	1m 1s
ember-beta	1m 0s
ember-canary	53s
'ember-lts-4.8 + embroider-safe'	31s
'ember-lts-4.8 + embroider-optimized'	32s
'ember-release + embroider-optimized'	39s
Release	0s
	12m 56s

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