Docs: Update build output folder in Internal docs (#2071)

website/docs/guides/internals.md

@@ -81,7 +81,7 @@ It then replaces the non-commented `using` directives with space characters.
 
 As described in [Scripts](scripts.md), `.sc` files are also "wrapped" in an `object`, and a `main` class is added to them, so that `.sc` files can be run as-is, and can access arguments via a special `args` variable.
 
-In all cases, the resulting processed sources are written in the `.scala/project_…/src_generated` directory, and passed to Bloop from there.
+In all cases, the resulting processed sources are written in the `.scala-build/project_…/src_generated` directory, and passed to Bloop from there.
 
 ## Postprocessing