Fix typo in example pip install command (#1929)

README.md

@@ -101,7 +101,7 @@ You can install them as follows:
 
 ```shell
     $ pip install connexion[swagger-ui]
-    $ pip install connexion[swagger-ui,uvicorn].
+    $ pip install connexion[swagger-ui,uvicorn]
 ```
 
 <p align="right">(<a href="#top">back to top</a>)</p>
@@ -280,4 +280,4 @@ Tools to help you work spec-first:
 [Pycharm plugin]: https://plugins.jetbrains.com/plugin/14837-openapi-swagger-editor
 [examples]: https://github.com/spec-first/connexion/blob/main/examples
 [Releases]: https://github.com/spec-first/connexion/releases
-[Architecture]: https://github.com/spec-first/connexion/blob/main/docs/images/architecture.png
+[Architecture]: https://github.com/spec-first/connexion/blob/main/docs/images/architecture.png