Add further FIRST_PR_LABELS
Add further FIRST_PR_LABELS

- 'E-Easy' is what the Rust world use.
abrophy/libraries.io,abrophy/libraries.io,samjacobclift/libraries.io,librariesio/libraries.io,tomnatt/libraries.io,librariesio/libraries.io,samjacobclift/libraries.io,librariesio/libraries.io,tomnatt/libraries.io,tomnatt/libraries.io,samjacobclift/libraries.io,librariesio/libraries.io,abrophy/libraries.io