Bump @testing-library/react from 14.1.2 to 15.0.4 in /js #1648

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Job	Run time
Check conditional workflows and jobs	8s
Build	0s
Base IT	0s
Quarkus UT	0s
Base UT	0s
Clustering IT	0s
Java Distribution IT	0s
Quarkus IT	0s
Store IT	0s
FIPS IT	0s
FIPS UT	0s
Store Model Tests	0s
Account Console IT	0s
Forms IT	0s
Migration Tests	0s
SSSD	0s
WebAuthn IT	0s
Status Check - Keycloak CI	8s
	16s

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