Update dependency ember-page-title to v9 #1460

Job	Run time
Tests	1m 14s
Floating Dependencies	48s
ember-lts-3.28	1m 19s
ember-lts-4.12	48s
ember-lts-4.8	1m 19s
ember-release	43s
ember-lts-5.12	59s
ember-beta	50s
ember-lts-4.4	49s
ember-modifier-3.2.7	58s
ember-release-no-deprecations	46s
ember-canary	56s
no-deprecations	58s
embroider-safe	47s
embroider-optimized	56s
	14m 10s

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