[ci] Fix incorrect condition

[poteto]

Oops, missed this when I switched it from checking if its a fork to checking if its from this repo.

[react-sizebot]

Comparing: 740a4f7...12d2c98

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.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	515.14 kB	515.14 kB	=	91.74 kB	91.74 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	614.35 kB	614.35 kB	=	108.76 kB	108.76 kB
facebook-www/ReactDOM-prod.classic.js	=	650.34 kB	650.34 kB	=	114.79 kB	114.79 kB
facebook-www/ReactDOM-prod.modern.js	=	640.62 kB	640.62 kB	=	113.23 kB	113.23 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 12d2c98