Use GH_PAT token to hopefully fix releases #5923

Job	Run time
Build extensions	1m 29s
Test	2m 9s
ember-try (ember-lts-3.16)	1m 12s
ember-try (ember-lts-3.20)	1m 21s
ember-try (ember-lts-3.24)	1m 14s
ember-try (ember-lts-3.28)	1m 13s
ember-try (ember-release)	1m 16s
ember-try (ember-beta)	1m 22s
ember-try (ember-canary)	1m 15s
ember-try (ember-default-no-prototype-extensions)	1m 12s
Publish Chrome extension	4s
Publish Firefox extension	21s
Publish npm package	5s
Publish bookmarklet	0s
	14m 13s

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