Made all Project-Id-Version strings consistent

Also removed the version number from some of the `.po` files, to reduce
the number of places where it's (ideally) necessary to update the
version number every time the project is updated.

Author: ddabble

simple_history/locale/ar/LC_MESSAGES/django.mo

@@ -5,7 +5,7 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: \n"
+"Project-Id-Version: django-simple-history\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2022-11-08 11:30+0300\n"
 "PO-Revision-Date: 2022-11-08 13:54+0300\n"

simple_history/locale/ar/LC_MESSAGES/django.po

@@ -5,7 +5,7 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: \n"
+"Project-Id-Version: django-simple-history\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2021-09-18 21:54+0200\n"
 "PO-Revision-Date: 2021-09-20 19:50+0200\n"

simple_history/locale/cs_CZ/LC_MESSAGES/django.mo

@@ -6,7 +6,7 @@
 #, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: \n"
+"Project-Id-Version: django-simple-history\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2018-11-21 15:58+0100\n"
 "PO-Revision-Date: 2018-11-21 16:31+0100\n"

simple_history/locale/cs_CZ/LC_MESSAGES/django.po

@@ -5,7 +5,7 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: \n"
+"Project-Id-Version: django-simple-history\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2021-04-04 01:50+0300\n"
 "PO-Revision-Date: 2020-04-25 22:50+0200\n"

simple_history/locale/de/LC_MESSAGES/django.mo

@@ -5,7 +5,7 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: django-simple-history 3.3.0\n"
+"Project-Id-Version: django-simple-history\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2023-06-30 15:21+0800\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"