Update README.md

Author: jquense

README.md

@@ -111,8 +111,8 @@ const parsedUser = await userSchema.validate(
     - [`Schema.withMutation(builder: (current: Schema) => void): void`](#schemawithmutationbuilder-current-schema--void-void)
     - [`Schema.default(value: any): Schema`](#schemadefaultvalue-any-schema)
     - [`Schema.getDefault(options?: object): Any`](#schemagetdefaultoptions-object-any)
-    - [`Schema.nullable(message?: string | function): Schema`](#schemanullable-schema)
-    - [`Schema.nonNullable(message?: string | function): Schema`](#schemanonnullable-schema)
+    - [`Schema.nullable(message?: string | function): Schema`](#schemanullablemessage-string--function-schema)
+    - [`Schema.nonNullable(message?: string | function): Schema`](#schemanonnullablemessage-string--function-schema)
     - [`Schema.defined(): Schema`](#schemadefined-schema)
     - [`Schema.optional(): Schema`](#schemaoptional-schema)
     - [`Schema.required(message?: string | function): Schema`](#schemarequiredmessage-string--function-schema)