fix(docs): bad link

Refs #609

docs/en/calculators/pam/macrorugo_remous.md

@@ -24,7 +24,7 @@ slope of the water is equal to the slope of the bottom of the channel.
 The rock-ramp fishpass module is used here to calculate the slope of the water
 in the non-uniform case.
 The fluvial backwater curve is then calculated from the water level
-downstream using the [trapezoid integration method](../../numerical_methods/integration_trapezes.md).
+downstream using the [trapezoid integration method](../../methodes_numeriques/integration_trapezes.md).
 
 This module is based on [the module for calculating the backwater curve of a
 section](../hsl/courbe_remous.md) to calculate and display the results.