Update explore.json

Edit summary: 
* Changed [title] and [message] from "or remix someone elses" to "Or remix one of these examples!"
* Changed [title] and [message] from "Get inspired by examples like these" to "Get inspired by more examples like these"
This line (i.e. `"or remix someone elses": {`) should stay the same as it was, or it should be changed where it is being used elsewhere in the code in the same pull request. (sorry I wasn't clearer earlier, I misunderstood and thought you were just changing the punctuation there)