run corepack yarn
seems like it's gone out of sync:
Run corepack yarn install --immutable
➤ YN0000: ┌ Resolution step
Resolution step
➤ YN0000: └ Completed in 0s 979ms
➤ YN0000: ┌ Post-resolution validation
Post-resolution validation
➤ YN0028: - svelte: ^4.0.0
➤ YN0028: + svelte: ^3.0.0 || ^4.0.0
➤ YN0028: The lockfile would have been modified by this install, which is explicitly forbidden.