Bump release-it from 15.10.3 to 16.1.5 #492

Job	Run time
Floating Dependencies	1m 54s
Tests	2m 13s
ember-try: ember-lts-3.28	2m 14s
ember-try: ember-lts-4.4	2m 13s
ember-try: ember-release	3m 21s
ember-try: ember-beta	2m 15s
ember-try: ember-canary	2m 23s
ember-try: ember-classic	1m 46s
ember-try: embroider-safe	2m 27s
ember-try: embroider-optimized	2m 30s
	23m 16s

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