docs: add toc to CODE OF CONDUCT

Author: jsjoeio

docs/CODE_OF_CONDUCT.md

@@ -1,5 +1,18 @@
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+# Contributor Covenant Code of Conduct
+
+- [Contributor Covenant Code of Conduct](#contributor-covenant-code-of-conduct)
+  - [Our Pledge](#our-pledge)
+  - [Our Standards](#our-standards)
+  - [Our Responsibilities](#our-responsibilities)
+  - [Scope](#scope)
+  - [Enforcement](#enforcement)
+  - [Attribution](#attribution)
+
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+<!-- prettier-ignore-end -->
 
 # Contributor Covenant Code of Conduct