fix: move level creation email to dotdigital

[evemartin]

This change is 

[faucomte97]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @evemartin)

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game/level_management.py line 192 at r1 (raw file):

    send_dotdigital_email(
        campaign_ids["level_creation"], 

You've got a few trailing whitespaces here, running Black should fix it 🙂

[faucomte97]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @evemartin)