Update README.md

README.md

 ### Feature management
 *Libraries for implementing feature flags, a/b tests, and remote configuration*
 
-* [Featurevisor](https://featurevisor.com) - Feature flags management with Git, supporting [PHP SDK](https://featurevisor.com/docs/sdks/php/)
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+* [Featurevisor](https://featurevisor.com) - Feature flags management with Git, supporting [PHP SDK](https://featurevisor.com/docs/sdks/php/).
 
 ### Third Party APIs
 *Libraries for accessing third party APIs.*