Decrease interaction count for Sensei to 5

[donnapep]

Proposed changes:

Sensei is not a hugely popular plugin, so using a threshold of 10 user reports is too high. This PR decreases it to 5.

Other information:

• Have you written new tests for your changes, if applicable?
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Does this pull request change what data or activity we track or use?

No

Testing instructions:

Not sure.

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