Create 3.8.3.yaml (#304)

Add Python-3.8.3

manifests/Python/Python/3.8.3.yaml

@@ -0,0 +1,17 @@
+Id: Python.Python
+Version: 3.8.3
+Name: Python
+Publisher: Python
+Homepage: https://www.python.org
+License: PSF LICENSE AGREEMENT FOR PYTHON
+LicenseUrl: https://docs.python.org/3/license.html
+Description: Python is a programming language that lets you work more quickly and integrate your systems more effectively.
+AppMoniker: python
+Installers: 
+    - Arch: x64
+      Url: https://www.python.org/ftp/python/3.8.3/python-3.8.3-amd64.exe
+      InstallerType: Exe
+      Sha256: c74898382a5192d4b506767cbb4b41b8e80b734b8a7ce1fbb13e4aba8ffe5bf6
+      Switches:
+        Silent: /Quiet
+        SilentWithProgress: /Passive