fix: zero entire public key array instead of only first byte (#9619)

src/modules/NodeInfoModule.cpp

@@ -148,7 +148,7 @@ meshtastic_MeshPacket *NodeInfoModule::allocReply()
 
         // Strip the public key if the user is licensed
         if (u.is_licensed && u.public_key.size > 0) {
-            u.public_key.bytes[0] = 0;
+            memset(u.public_key.bytes, 0, sizeof(u.public_key.bytes));
             u.public_key.size = 0;
         }