Fix typo in ReactFiberLane.new.js

[eltociear]

Summary

Fixed typo.

continous -> continuous

Test Plan

[sizebot]

Comparing: 4874042...4532edc

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	122.76 kB	122.76 kB	=	39.42 kB	39.42 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	129.34 kB	129.34 kB	=	41.51 kB	41.51 kB
facebook-www/ReactDOM-prod.classic.js	=	412.52 kB	412.52 kB	=	76.35 kB	76.35 kB
facebook-www/ReactDOM-prod.modern.js	=	400.55 kB	400.55 kB	=	74.45 kB	74.45 kB
facebook-www/ReactDOMForked-prod.classic.js	=	412.52 kB	412.52 kB	=	76.35 kB	76.35 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 4532edc

[bvaughn]

The type fix is fine here, but can't land this change without also changing packages/react-reconciler/src/ReactFiberLane.old.js. These two files must match.