Fixup breakage between two outstanding PRs

This has now happened twice, so I'm inclined to turn on the setting that
requires branches to be up to date in order to be mergeable.

write-fonts/src/font_builder.rs

@@ -3,7 +3,7 @@
 use std::collections::BTreeMap;
 use std::{borrow::Cow, fmt::Display};
 
-use read::{FontRef, TableProvider};
+use read_fonts::{FontRef, TableProvider};
 use types::{Tag, TT_SFNT_VERSION};
 
 include!("../generated/generated_font.rs");