Update peter-evans/create-pull-request action to v7 #1171

Job	Run time
Lints	1m 11s
Test ember-scoped-css	1m 8s
Test test-apps/classic-app	1m 42s
Test test-apps/embroider-app	1m 23s
Test test-apps/pods-embroider-app	1m 9s
Test test-apps/pods-classic-app	1m 24s
Floating ember-scoped-css	1m 2s
Floating test-apps/classic-app	1m 51s
ember-lts-4.4	1m 54s
Floating test-apps/embroider-app	1m 8s
Floating test-apps/pods-embroider-app	1m 33s
ember-lts-4.12	1m 56s
Floating test-apps/pods-classic-app	1m 19s
ember-lts-5.4	1m 56s
ember-lts-5.8	2m 12s
ember-release	2m 27s
ember-beta	1m 57s
	27m 12s

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