v17.2.1-hotfix.4

What's Changed

• Fix TypeError when educators submit an invalid student count by @mwvolo in #1717
• Fix fuzzy_search partial records and log SheerID error steps by @mwvolo in #1716
• reduce marketing lingo in pin email for better deliverability by @mwvolo in #1719
• Pin email spam by @mwvolo in #1720

Full Changelog: v17.2.0...v17.2.1-hotfix.4