Error in 'validate builtin set names' algorithm details

[ast-hugger]

The steps of validate builtin set names as it appears in Editor’s Draft, 23 August 2024 are:

1. If builtinSetNames contains any duplicates, return false.
2. Return false.

Step 2 should be "Return true".

[eqrion]

Thanks! Fixed in 753b7a1.