Fix minor typo in README

[skip ci]

Author: michaelmior

README.md

@@ -52,7 +52,7 @@ Any invalid JSON will be skipped and not produce an error.
 It is therefore recommended to validate the JSON before providing to JSONoid if handling invalid input is required.
 The generated schema will be printed [JSON Schema](https://json-schema.org/) as output.
 Note that depending on the configuration, JSONoid will add additional properties which are not part of the JSON Schema standard.
-The format is described in the [JSON Schema Profile](https://github.com/dataunitylab/json-schema-profile) draft and is subject to change..
+The format is described in the [JSON Schema Profile](https://github.com/dataunitylab/json-schema-profile) draft and is subject to change.
 
 ## Running :running: