Fix link to fbjs (#21863)

`fbjs` doesn't have the `main` branch and it is `master`

Author: e-hosseini

scripts/print-warnings/print-warnings.js

@@ -19,7 +19,7 @@ const parserOptions = {
   // babelParser has its own options and we can't directly
   // import/require a babel preset. It should be kept **the same** as
   // the `babel-plugin-syntax-*` ones specified in
-  // https://github.com/facebook/fbjs/blob/main/packages/babel-preset-fbjs/configure.js
+  // https://github.com/facebook/fbjs/blob/master/packages/babel-preset-fbjs/configure.js
   plugins: [
     'classProperties',
     'flow',