Rename master branch to main in the the heroku sub-generator

[SudharakaP]

The heroku sub-generator still seems to use the master branch instead of main. This resolves that.

Related to #12718 and #11935

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[pascalgrimaud]

I didn't change it because I don't know how works the git repository at Heroku
Did they change their default branch to main, as GitHub did ?

[SudharakaP]

It seems they did. It's mentioned here, https://devcenter.heroku.com/articles/git-branches 🙃

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On Mon, Nov 9, 2020, 10:16 PM Pascal Grimaud ***@***.***> wrote: I didn't change it because I don't know how works the git repository at Heroku Did they change their default branch to main, as GitHub did ? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#13013 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC64D7OHYAYII735XNH6HIDSPDLDPANCNFSM4TP7AQCQ> .

[pascalgrimaud]

oh cool, so let's go !