Merge branch 'humitos/apiv3/project-update-endpoint' of github.com:readthedocs/readthedocs.org into humitos/apiv3/project-update-endpoint

Author: humitos

docs/api/v3.rst

@@ -232,7 +232,7 @@ Project update
 
 .. http:patch:: /api/v3/projects/(string:project_slug)/
 
-    Edit an existent project.
+    Edit an existing project.
 
     **Example request**: