simplify AGPL-3.0 licenses

- all AGPL-3.0 licensed projects use the 'or later' variant of the license
- to simplify the list of licenses and their managemnt in the list, just refer to both -only and -or-later variants as AGPL-3.0

README.md

@@ -131,9 +131,9 @@ Digital [archiving](https://en.wikipedia.org/wiki/Archival_science) and [preserv
 
 _Related: [Content Management Systems (CMS)](#content-management-systems-cms)_
 
-- [Access to Memory (AtoM)](https://www.accesstomemory.org/) - Web-based, open source application for standards-based archival description and access in a multilingual, multi-repository environment. ([Demo](https://demo.accesstomemory.org/), [Source Code](https://github.com/artefactual/atom)) `AGPL-3.0-only` `PHP`
+- [Access to Memory (AtoM)](https://www.accesstomemory.org/) - Web-based, open source application for standards-based archival description and access in a multilingual, multi-repository environment. ([Demo](https://demo.accesstomemory.org/), [Source Code](https://github.com/artefactual/atom)) `AGPL-3.0` `PHP`
 - [ArchiveBox](https://archivebox.io/) - Self-hosted _wayback machine_ that creates HTML & screenshot archives of sites from your bookmarks, browsing history, RSS feeds, or other sources. ([Source Code](https://github.com/ArchiveBox/ArchiveBox)) `MIT` `Python`
-- [Archivematica](https://www.archivematica.org/en/) - Mature digital preservation system designed to maintain standards-based, long-term access to collections of digital objects. ([Demo](https://sandbox.archivematica.org/administration/accounts/login/), [Source Code](https://github.com/artefactual/archivematica)) `AGPL-3.0-only` `Python`
+- [Archivematica](https://www.archivematica.org/en/) - Mature digital preservation system designed to maintain standards-based, long-term access to collections of digital objects. ([Demo](https://sandbox.archivematica.org/administration/accounts/login/), [Source Code](https://github.com/artefactual/archivematica)) `AGPL-3.0` `Python`
 - [ArchivesSpace](https://archivesspace.org/) - Archives information management application for managing and providing Web access to archives, manuscripts and digital objects. ([Demo](https://archivesspace.org/application/demo), [Source Code](https://github.com/archivesspace/archivesspace)) `ECL-2.0` `Ruby`
 - [CKAN](https://ckan.org) - CKAN is a tool for making open data websites. ([Source Code](https://github.com/ckan/ckan)) `AGPL-3.0` `Python`
 - [Collective Access - Providence](https://collectiveaccess.org/) - Highly configurable Web-based framework for management, description, and discovery of digital and physical collections supporting a variety of metadata standards, data types, and media formats. ([Source Code](https://github.com/collectiveaccess/providence)) `GPL-3.0-only` `PHP`
@@ -1373,7 +1373,7 @@ _See also: [awesome-sysadmin/IT Asset Management](https://github.com/awesome-fos
 - [REI3](https://rei3.de/home_en/) - Open source, expandable Business Management Software. Manage tasks, time, assets and much more. ([Demo](https://rei3.de/demo_en/), [Source Code](https://github.com/r3-team/r3)) `MIT` `Go`
 - [SilverStrike](https://silverstrike.org/) - Personal finance management made easy. ([Demo](https://demo.silverstrike.org/), [Source Code](https://github.com/agstrike/silverstrike)) `MIT` `Python/Django`
 - [StockazNG](https://dev.sigpipe.me/dashie/StockazNG) - Asset Management System. `MIT` `Python`
-- [Tabby](https://github.com/bertvandepoel/tabby) - A tool to manage shared expenses across friends, such as restaurant costs or food delivery, without requiring everyone to create an account. Includes email reminders and tracks who has (re)paid what. `AGPL-3.0-only` `PHP`
+- [Tabby](https://github.com/bertvandepoel/tabby) - A tool to manage shared expenses across friends, such as restaurant costs or food delivery, without requiring everyone to create an account. Includes email reminders and tracks who has (re)paid what. `AGPL-3.0` `PHP`
 
 
 ### Monitoring