docs: update no-wait-for-empty-callback docs (#369)

MichaelDeBoey · web-flow · commit 632b492612d9 · 2021-05-04T13:09:55.000+02:00
diff --git a/docs/rules/no-wait-for-empty-callback.md b/docs/rules/no-wait-for-empty-callback.md
@@ -38,3 +38,4 @@ const foo = async () => {
 ## Further Reading
 
 - [dom-testing-library v7 release](https://github.com/testing-library/dom-testing-library/releases/tag/v7.0.0)
+- [inspiration for this rule](https://kentcdodds.com/blog/common-mistakes-with-react-testing-library#passing-an-empty-callback-to-waitfor)

Original file line number	Diff line number	Diff line change
`@@ -38,3 +38,4 @@ const foo = async () => {`
`38`	`38`	`## Further Reading`
`39`	`39`
`40`	`40`	`- [dom-testing-library v7 release](https://github.com/testing-library/dom-testing-library/releases/tag/v7.0.0)`
	`41`	`+- [inspiration for this rule](https://kentcdodds.com/blog/common-mistakes-with-react-testing-library#passing-an-empty-callback-to-waitfor)`