Update microstrip.pro

Electrostatics/microstrip.pro

@@ -200,7 +200,7 @@ Formulation {
 
      (epsilon grad v, grad v')_Vol_Ele = 0
 
-     holds for all v'. Finally, our choice here is to use a Gakerkin method,
+     holds for all v'. Finally, our choice here is to use a Galerkin method,
      where the test functions v' are the same basis functions ("sn_k") as the
      ones used to interpolate the unknown potential v.