There are some typos in releasenotes

This is to correct the typos in releasenotes

Change-Id: Ibe15293e0a950e08d7077b6b43467c4d78a0beac
diff --git a/releasenotes/notes/12.2.0-clients_module-16f3025f515bf9ec.yaml b/releasenotes/notes/12.2.0-clients_module-16f3025f515bf9ec.yaml
index 484d543..d07448a 100644
--- a/releasenotes/notes/12.2.0-clients_module-16f3025f515bf9ec.yaml
+++ b/releasenotes/notes/12.2.0-clients_module-16f3025f515bf9ec.yaml
@@ -4,7 +4,7 @@
     plugins to declare and automatically register any service client defined
     in the plugin.
   - tempest.lib exposes a new stable interface, the clients module and
-    ServiceClients class, which provides a convinient way for plugin tests to
+    ServiceClients class, which provides a convenient way for plugin tests to
     access service clients defined in Tempest as well as service clients
     defined in all loaded plugins.
     The new ServiceClients class only exposes for now the service clients