Fix board-registration entrypoints links

Author: Matteo-it

content/hardware/02.hero/boards/uno-r4-minima/features.md

@@ -24,7 +24,7 @@ The UNO R4 Minima is the first UNO to feature a USB-C® connector.
 With Arduino UNO R4 you will get 3 months of cloud maker plan for free
 
 <FeatureWrapper>
-<FeatureLink variant="primary" title="Register product" url="https://digital-store.arduino.cc/subscriptions/redeem"/>
+<FeatureLink variant="primary" title="Register product" url="https://arduino.cc/start"/>
 </FeatureWrapper>
 </Feature>
 

content/hardware/02.hero/boards/uno-r4-wifi/features.md

@@ -27,7 +27,7 @@ A reference to all technical features on this board, with pointers to additional
 With Arduino UNO R4 you will get 3 months of cloud maker plan for free
 
 <FeatureWrapper>
-<FeatureLink variant="primary" title="Register product" url="https://digital-store.arduino.cc/subscriptions/redeem"/>
+<FeatureLink variant="primary" title="Register product" url="https://arduino.cc/start"/>
 </FeatureWrapper>
 </Feature>
 

content/hardware/09.kits/maker/plug-and-make-kit/features.md

@@ -23,7 +23,7 @@ The kit includes a mounting plate for you to build your projects on, enabling yo
 With Plug and Make kit you will get 3 months of cloud maker plan for free
 
 <FeatureWrapper>
-<FeatureLink variant="primary" title="Register product" url="https://digital-store.arduino.cc/subscriptions/redeem"/>
+<FeatureLink variant="primary" title="Register product" url="https://arduino.cc/start"/>
 </FeatureWrapper>
 </Feature>