doc: fix typo in comments

dereferencable -> dereferenceable

compiler/rustc_const_eval/src/interpret/intrinsics.rs

@@ -140,7 +140,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 
             sym::min_align_of_val | sym::size_of_val => {
                 // Avoid `deref_operand` -- this is not a deref, the ptr does not have to be
-                // dereferencable!
+                // dereferenceable!
                 let place = self.ref_to_mplace(&self.read_immediate(&args[0])?)?;
                 let (size, align) = self
                     .size_and_align_of_mplace(&place)?

compiler/rustc_const_eval/src/interpret/place.rs

@@ -327,7 +327,7 @@ where
         self.memory.get_mut(place.ptr, size, place.align)
     }
 
-    /// Check if this mplace is dereferencable and sufficiently aligned.
+    /// Check if this mplace is dereferenceable and sufficiently aligned.
     fn check_mplace_access(
         &self,
         mplace: MPlaceTy<'tcx, M::PointerTag>,