Update PParts.md

MPCNC Belt update

Author: V1EngineeringInc

docs/mpcnc/PParts.md

@@ -97,7 +97,7 @@ Some of these are affiliate links, you can buy from these links or just use them
 | Part                | QTY | V1 Link                                                                                                                              | Other Link                                                |
 |---------------------|-----|--------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------|
 | Nema 17 50OZ/in+    | 5   | [Shop](https://www.v1e.com/collections/parts/products/nema-17-76oz-in-steppers)                                           | [Amazon](https://amzn.to/3hQKILc)                         |
-| * Belt GT2 10mm     | 4   | [Shop](https://www.v1e.com/collections/lowrider-parts/products/gt2-10mm-belt)                                             | [Amazon](https://amzn.to/2V5pfo8)                         |
+| * Belt GT2 10mm     | 3   | [Shop](https://www.v1e.com/collections/lowrider-parts/products/gt2-10mm-belt)                                             | [Amazon](https://amzn.to/2V5pfo8)                         |
 | Pulley 16t gt2 10mm (5mm bore) | 4   | [Shop](https://www.v1e.com/collections/lowrider-parts/products/pulley-16-tooth-gt2-10mm)                                  | [Amazon](https://amzn.to/2VmDWTR)                         |
 | Idler 20t gt2 10mm  (5mm bore)| 8   | [Shop](https://www.v1e.com/collections/lowrider-parts/products/20t-idler-gt2-10mm)                                        | [Amazon](https://amzn.to/37TNJWh)                         |
 | Power Supply        | 1   | [Shop](https://www.v1e.com/products/24v-power-supply)                                                                     | [Amazon](https://amzn.to/2Cwlp0M)                         |