chore(deps): update pnpm to v9.15.3 #2691

Job	Run time
lint:types	29s
lint:hbs	26s
lint:js	42s
lint:css	27s
test	36s
Ember Try (ember-3.28)	6h 0m 14s
Ember Try (ember-4.12)	38s
Ember Try (ember-5.4)	43s
Ember Try (ember-5.8)	43s
Ember Try (ember-5.12)	39s
Ember Try (ember-release)	56s
Ember Try (ember-beta)	38s
Ember Try (ember-canary)	43s
Ember Try (embroider-safe)	52s
Ember Try (embroider-optimized)	56s
	6h 9m 42s

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