Update BIP351 reference implementation link

Author: alfred-hodler

bip-0351.mediawiki

@@ -250,7 +250,7 @@ Another opportunity exists for an existing business to attach notification paylo
 
 ==Reference Implementation==
 
-Reference implementation is available at https://github.com/alfred-hodler/bip-351-private-payments
+Reference implementation is available at https://github.com/private-payments/rust-private-payments
 
 ==Reference==
 * [[bip-0032.mediawiki|BIP32 - Hierarchical Deterministic Wallets]]
@@ -259,5 +259,5 @@ Reference implementation is available at https://github.com/alfred-hodler/bip-35
 * [[bip-0047.mediawiki|BIP47 - Reusable Payment Codes for Hierarchical Deterministic Wallets]]
 * [[bip-0157.mediawiki|BIP157 - Client Side Block Filtering]]
 * [[bip-0158.mediawiki|BIP158 - Compact Block Filters for Light Clients]]
-* [https://gist.github.com/RubenSomsen/21c477c90c942acf45f8e8f5c1ad4fae BIP47 Prague Discussion (acknowledgements: @rubensomsen, @afilini, @kixunil]
+* [https://gist.github.com/RubenSomsen/21c477c90c942acf45f8e8f5c1ad4fae BIP47 Prague Discussion (acknowledgements: @rubensomsen, @afilini, @kixunil])