Fix inline comment in Quadrupole class (pals-project#50)

Author: EZoni

src/pals/kinds/Quadrupole.py

@@ -10,6 +10,6 @@ class Quadrupole(ThickElement):
     # Discriminator field
     kind: Literal["Quadrupole"] = "Quadrupole"
 
-    # Octupole-specific parameters
+    # Quadrupole-specific parameters
     ElectricMultipoleP: Optional[ElectricMultipoleParameters] = None
     MagneticMultipoleP: MagneticMultipoleParameters