Update module name

Looks like I forgot to do this, when I renamed `Edge` to `HalfEdge` a
while ago.

crates/fj-core/src/operations/update/mod.rs

@@ -1,15 +1,15 @@
 //! Operations to update objects
 
 mod cycle;
-mod edge;
 mod face;
+mod half_edge;
 mod region;
 mod shell;
 mod sketch;
 mod solid;
 
 pub use self::{
-    cycle::UpdateCycle, edge::UpdateHalfEdge, face::UpdateFace,
+    cycle::UpdateCycle, face::UpdateFace, half_edge::UpdateHalfEdge,
     region::UpdateRegion, shell::UpdateShell, sketch::UpdateSketch,
     solid::UpdateSolid,
 };