Change Relationships name

Hello Everyone

I just want to know how I can change the name of relationships in neo4j. I have many relationships that have label "IS_CONNECTED_TO". Right now I want to substitute them all with "KNOWS". Does anybody know how I can do it?

Thanks

Hey Ameya, This helped me a lot. Thank you.
Could kindly share how to change the Node Label Name (Constraint) using APOC ?