Fix mailjet 404s

[robz]

We're passing the wrong param to this API

Testplan

Run a small script with the latest job ID from cloudwatch logs. The first test returns a 404, the second returns 200:

import os, sys
from mailjet_rest import Client

client = Client(
    auth=(os.environ["MJ_PUBLIC"], os.environ["MJ_SECRET"]), version="v3"
)

job_id = sys.argv[1]

# Test with id= (the old broken way)
r1 = client.contact_managemanycontacts.get(id=job_id)
print(f"id={job_id}:        status={r1.status_code} {r1.json()}")

# Test with action_id= (the fix)
r2 = client.contact_managemanycontacts.get(action_id=job_id)
print(f"action_id={job_id}: status={r2.status_code} {r2.json()}")