Replace 'has been` with is

[constantakopoulos]

A minor issue with pullRequest.state in case the pull request is open, the notification publishes that Pull request title has been open which is grammatically incorrect. Since the pullRequest.statetakes specific values, we could simply update the string by adding is instead of has been and this way if I get it correctly, it would publish that the Pull request title is open.

google-chat-notification/src/notify.ts

Line 49 in 0e92788

)}">${pullRequest.title}</font> has been ${