chore(deps): update dependency ember-cli-fastboot-testing to v0.6.2 #3559

Job	Run time
Lint Addon	28s
Lint Test App	29s
Tests (ember-4.0, false)	1m 7s
embroider-optimized - Allowed to fail	1m 10s
Tests (Floating Dependencies)	55s
Tests (ember-lts-4.4, false)	59s
ember-beta - Allowed to fail	1m 0s
Tests (ember-lts-4.8, false)	52s
ember-canary - Allowed to fail	1m 2s
Tests (ember-4.12, false)	47s
Tests (ember-lts-5.8, false)	1m 0s
Tests (ember-default, false)	50s
Tests (ember-release, false)	58s
Tests (embroider-safe, false)	57s
	12m 34s

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