fix: change 'decentralised' to 'decentralized' (#4967)

src/data/roadmaps/blockchain/content/102-blockchain-oracles/index.md

@@ -1,6 +1,6 @@
 # Blockchain Oracles
 
-A blockchain oracle is a third-party service that connects smart contracts with the outside world, primarily to feed information in from the world, but also the reverse. Information from the world encapsulates multiple sources so that decentralised knowledge is obtained.
+A blockchain oracle is a third-party service that connects smart contracts with the outside world, primarily to feed information in from the world, but also the reverse. Information from the world encapsulates multiple sources so that decentralized knowledge is obtained.
 
 Visit the following resources to learn more:
 

src/data/roadmaps/blockchain/content/109-dapps/index.md

@@ -1,6 +1,6 @@
 # dApps
 
-A decentralised application (dApp) is an application that can operate autonomously, through the use of smart contracts that run on a blockchain. Like traditional applications, dApps provide some function or utility to its users.
+A decentralized application (dApp) is an application that can operate autonomously, through the use of smart contracts that run on a blockchain. Like traditional applications, dApps provide some function or utility to its users.
 
 Visit the following resources to learn more: