add HOC cheatsheeta

Author: cedev935

README.md

@@ -21,6 +21,9 @@ Translations:
   - The goal is to take _full advantage_ of TypeScript.
 - **The Migrating Cheatsheet** ([`/MIGRATING.md`](/MIGRATING.md)) helps collate advice for incrementally migrating large codebases from JS or Flow, **from people who have done it**.
   - We do not try to convince people to switch, only to help people who have already decided
+  - ⚠️This is a new cheatsheet, all assistance is welcome
+- **The HOC Cheatsheet** ([`/HOC.md`](/HOC.md)) specifically teaches people to write HOCs with examples.
+  - Familiarity with [Generics](https://www.typescriptlang.org/docs/handbook/generics.html) is necessary.
   - ⚠️This is the newest cheatsheet, all assistance is welcome
 
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