chore(deps): update webpack requirement from ^5.81.0 to ^5.88.1 in /test-app #541

Job	Run time
Tests	1m 35s
Floating Dependencies	1m 56s
ember-try: ember-lts-3.28	1m 34s
ember-try: ember-lts-4.4	1m 25s
ember-try: ember-release	2m 4s
ember-try: ember-beta	1m 29s
ember-try: ember-canary	1m 39s
ember-try: ember-classic	1m 25s
ember-try: embroider-safe	2m 16s
ember-try: embroider-optimized	2m 6s
	17m 29s

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