Cross-link fixes

src/adiabatic_berry.md

@@ -196,7 +196,7 @@ $\psi_0(\mathbf{r}-\mathbf{R})$.
     where we used the fact that $\nabla_{\mathbf{R}} \psi_0(\mathbf{r} -
     \mathbf{R}) = -\nabla_{\mathbf{r}} \psi_0(\mathbf{r} - \mathbf{R})$.
 
-4. We can now use this to evaluate inner product inside [the integral of the Berry phase](#541-the-berry-phase):
+4. We can now use this to evaluate inner product inside [the integral of the Berry phase](#641-the-berry-phase):
 
 
     $$