update to Ember 5.8 using ember-cli-update #759

Job	Run time
lint-all-packages	11s
Legacy Mocha Tests - 16.x	10s
Ember Tests (16.x, ubuntu-latest)	8s
discover_matrix	10s
Legacy Mocha Tests - 14.x	14s
Ember Tests (16.x, windows-latest)	34s
Test Packages (16.x, ubuntu-latest)	8s
Ember Tests (14.x, ubuntu-latest)	14s
Ember Tests (14.x, windows-latest)	28s
Test Packages (16.x, windows-latest)	36s
ember-try for ember-cli-fastboot: ember-lts-3.16	14s
Test Packages (14.x, ubuntu-latest)	11s
ember-try for ember-cli-fastboot: ember-lts-3.20	14s
Test Packages (14.x, windows-latest)	49s
ember-try for ember-cli-fastboot: ember-lts-3.24	9s
ember-try for ember-cli-fastboot: ember-lts-3.28	14s
ember-try for ember-cli-fastboot: ember-lts-4.4	9s
ember-try for ember-cli-fastboot: ember-lts-4.8	13s
ember-try for ember-cli-fastboot: ember-lts-4.12	13s
ember-try for ember-cli-fastboot: ember-lts-5.4	10s
ember-try for ember-cli-fastboot: ember-release	11s
ember-try for ember-cli-fastboot: ember-beta	11s
ember-try for ember-cli-fastboot: ember-canary	11s
ember-try for ember-cli-fastboot: embroider-safe	13s
ember-try for ember-cli-fastboot: embroider-optimized	11s
ember-try for ember-cli-fastboot: no-deprecations	10s
ember-try for ember-cli-fastboot: ember-release-no-deprecations	11s
${{ matrix.name }}	0s
	6m 47s

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