fix comment

src/coreclr/jit/codegenlinear.cpp

@@ -1195,8 +1195,8 @@ void CodeGen::genUnspillRegIfNeeded(GenTree* tree)
             // Load local variable from its home location.
             // In most cases the tree type will indicate the correct type to use for the load.
             // However, if it is NOT a normalizeOnLoad lclVar (i.e. NOT a small int that always gets
-            // widened when loaded into a register), and its size is not the same as genActualType of
-            // the type of the lclVar, then we need to change the type of the tree node when loading.
+            // widened when loaded into a register), and its size is not the same as the actual register type
+            // of the lclVar, then we need to change the type of the tree node when loading.
             // This situation happens due to "optimizations" that avoid a cast and
             // simply retype the node when using long type lclVar as an int.
             // While loading the int in that case would work for this use of the lclVar, if it is