Update README.md

Author: reganto

README.md

@@ -4,7 +4,7 @@
 <div align="center">
   <h1>django-ptpython</h1>
   <p align="center">
-    PtPython as default Django shell.
+    PtPython as the Default Django Shell.
     <br />
     <br />
     <a href="https://github.com/reganto/django-ptpython/actions?query=workflow%3ALinters+event%3Apush+branch%3Amaster" target="_blank">
@@ -43,7 +43,7 @@ INSTALLED_APPS = [
 ## Usage
 
 ```bash
-./manage shell
+./manage.py shell
 ```
 
 ![screenshot](https://user-images.githubusercontent.com/29402115/164965563-5d2091ef-e880-49a3-bef9-f1fc49419e54.png)
@@ -58,4 +58,4 @@ Distributed under the Apache License. See [LICENSE](https://github.com/reganto/d
 
 ## Contact
 
-Email: tell.reganto[at]gmail[dotcom]
+Email: tell.reganto[at]gmail[dot]com