Added missing link on v3.2.1

Author: vyskocilpavel

CHANGELOG.md

@@ -175,6 +175,7 @@ when storing one Perun attribute to more SAML attribute
 ## [v1.0.0]
 
 [Unreleased]: https://github.com/CESNET/perun-simplesamlphp-module/tree/master
+[v3.2.1]: https://github.com/CESNET/perun-simplesamlphp-module/tree/v3.2.1
 [v3.2.0]: https://github.com/CESNET/perun-simplesamlphp-module/tree/v3.2.0
 [v3.1.1]: https://github.com/CESNET/perun-simplesamlphp-module/tree/v3.1.1
 [v3.1.0]: https://github.com/CESNET/perun-simplesamlphp-module/tree/v3.1.0