Fix py3 package descriptions (#6009)

packages/py3_decorator.rb

@@ -1,7 +1,7 @@
 require 'package'
 
 class Py3_decorator < Package
-  description 'Colorama makes ANSI color sequences work on MS Windows.'
+  description 'define signature-preserving function decorators and decorator factories'
   homepage 'https://github.com/micheles/decorator/'
   @_ver = '4.4.2'
   version @_ver

packages/py3_parsedatetime.rb

@@ -1,7 +1,7 @@
 require 'package'
 
 class Py3_parsedatetime < Package
-  description 'Leather is a fast, approximate chart generator in Python.'
+  description 'Parse human-readable date/time strings'
   homepage 'https://github.com/bear/parsedatetime/'
   @_ver = '2.6'
   version @_ver

packages/py3_secretstorage.rb

@@ -1,7 +1,7 @@
 require 'package'
 
 class Py3_secretstorage < Package
-  description 'Jeepney is a low-level, pure Python DBus protocol wrapper.'
+  description 'Python bindings to Freedesktop.org Secret Service API'
   homepage 'https://secretstorage.readthedocs.io/'
   @_ver = '3.3.1'
   version @_ver

packages/py3_sortedcontainers.rb

@@ -1,7 +1,7 @@
 require 'package'
 
 class Py3_sortedcontainers < Package
-  description 'Pycryptodomex is a cryptographic library for Python.'
+  description 'Python Sorted Container Types: Sorted List, Sorted Dict, and Sorted Set'
   homepage 'http://www.grantjenks.com/docs/sortedcontainers/'
   @_ver = '2.3.0'
   version @_ver

packages/py3_tox.rb

@@ -1,7 +1,7 @@
 require 'package'
 
 class Py3_tox < Package
-  description 'Toml is a Python Library for Tom\'s Obvious, Minimal Language.'
+  description 'Command line driven CI frontend and development task automation tool.'
   homepage 'https://tox.readthedocs.io/'
   @_ver = '3.13.2'
   version @_ver