fix(clerk-js): Call openSignIn instead of openSignUp #11101

Job	Run time
check-permissions	4s
Formatting, linting & changeset checks	2m 26s
Unit Tests (18)	35s
Integration Tests (generic, chrome)	2m 4s
Unit Tests (22)	39s
Integration Tests (express, chrome)	2m 5s
Integration Tests (quickstart, chrome)	2m 6s
Integration Tests (ap-flows, chrome)	3m 16s
Integration Tests (elements, chrome)	2m 4s
Integration Tests (sessions, chrome)	4m 22s
Integration Tests (astro, chrome)	2m 9s
Integration Tests (expo-web, chrome)	2m 7s
Integration Tests (tanstack-start, chrome)	2m 0s
Integration Tests (tanstack-router, chrome)	2m 1s
Integration Tests (vue, chrome)	2m 0s
Integration Tests (nuxt, chrome)	2m 3s
Integration Tests (react-router, chrome)	2m 38s
Integration Tests (nextjs, chrome, 13)	2m 11s
Integration Tests (nextjs, chrome, 14)	2m 4s
Integration Tests (nextjs, chrome, 15)	2m 13s
	41m 7s

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