chore: changelog update

Signed-off-by: Charlike Mike Reagent <opensource@tunnckocore.com>

Author: tunnckoCore

CHANGELOG.md

@@ -1,5 +1,4 @@
-
-### Unreleased (`formidable@canary` dist-tag)
+### Unreleased (`canary` & `dev` dist-tags)
 
  * Test only on Node.js >= v10. Support only Node LTS and latest ([#515](https://github.com/node-formidable/node-formidable/pull/515))
  * stop using deprecated features ([#516](https://github.com/node-formidable/node-formidable/pull/516), [#472](https://github.com/node-formidable/node-formidable/issues/472), [#406](https://github.com/node-formidable/node-formidable/issues/406))