Update microstrip.pro

Electrostatics/microstrip.pro

@@ -19,7 +19,7 @@
 /* In this first tutorial we consider the calculation of the electric field
    given a static distribution of electric potential. This corresponds to an
    "electrostatic" physical model, obtained by combining the time-invariant
-   Maxwell-Ampere equation (Curl e = 0, with e the electric field) with Gauss'
+   Faraday equation (Curl e = 0, with e the electric field) with Gauss'
    law (Div d = rho, with d the displacement field and rho the charge density)
    and the dielectric constitutive law (d = epsilon e, with epsilon the
    dielectric permittivity).