chore: fix small typo in README.md (#416)

Author: 0xflotus

README.md

@@ -470,7 +470,7 @@ import { validate } from 'class-validator';
 
 class MyClass {
 	@MinLength(32, {
-		message: "EIC code must be at least 32 charatcers",
+		message: "EIC code must be at least 32 characters",
 		context: {
 			errorCode: 1003,
 			developerNote: "The validated string must contain 32 or more characters."
@@ -1046,4 +1046,4 @@ See information about breaking changes and release notes [here][3].
 
 [1]: https://github.com/chriso/validator.js
 [2]: https://github.com/pleerock/typedi
-[3]: CHANGELOG.md
+[3]: CHANGELOG.md