test(tanstackstart-react): remove outdated start-plugin-core pin#20511

nicohrubec wants to merge 1 commit intodevelopgetsentry/sentry-javascript:developfrom

fix/tanstackstart-react-unpin-start-plugin-coregetsentry/sentry-javascript:fix/tanstackstart-react-unpin-start-plugin-coreCopy head branch name to clipboard