package.json: Fix @babel/polyfill version
package.json: Fix @babel/polyfill version

This is a runtime dependency, so it should be controlled by
bots/npm-update.

This was introduced in commit cb00db034f4.

Closes #10867
martinpitt/cockpit,cockpituous/cockpit,garrett/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,andreasn/cockpit,moraleslazaro/cockpit,deryni/cockpit,moraleslazaro/cockpit,deryni/cockpit,andreasn/cockpit,garrett/cockpit,deryni/cockpit,andreasn/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,cockpit-project/cockpit,deryni/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,andreasn/cockpit,andreasn/cockpit,martinpitt/cockpit,cockpituous/cockpit,cockpituous/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,martinpitt/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,mvollmer/cockpit,andreasn/cockpit,deryni/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,garrett/cockpit,andreasn/cockpit,mvollmer/cockpit,martinpitt/cockpit,cockpituous/cockpit,moraleslazaro/cockpit