Update the link in Readme.md

[manshusainishab]

Currently in Readme.md in locally setup part the link given to clone is https://github.com/OWASP/common-requirement-enumeration.git which should be updated to https://github.com/OWASP/OpenCRE

[manshusainishab]

@northdpole @arkid15r please assign it to me as I am currently setting up the project locally.