snippet-bot: accept product prefix contactcenterinsights

[TrucHLe]

contactcenterinsights is the correct product prefix for Contact Center Insights so snippet-bot shouldn't flag this prefix. For example, snippet-bot flagged it here[1] but it shouldn't have done so.
[1] googleapis/python-contact-center-insights#11 (comment)

[busunkim96]

Just to add on, DevRel Services seems to list contactcenterinsights as the expected region tag.

[tmatsuo]

Ah this is a known pitfall. The product in DevRel Services is marked as "not" public. Once the product is marked as public, the prefix will be accepted.

[busunkim96]

Ohhh that makes sense. Opened a request internally to flip that switch (see 195944890).

Thanks @tmatsuo!