Fix YAML syntax error

Author: DavidMStraub

gramps_webapi/data/apispec.yaml

@@ -8,7 +8,7 @@ info:
 
 
     * More about Gramps and the numerous features it provides for genealogists can be found at https://gramps-project.org
-  version: "0.4.1  # make sure to match this version with the one in _version.py
+  version: "0.4.1"  # make sure to match this version with the one in _version.py
   license:
     name: "GNU Affero General Public License v3.0"
     url: "http://www.gnu.org/licenses/agpl-3.0.html"