Add WeeklyOSM (#152)

Add a link to WeeklyOSM, news and updates about OSM.

README.md

@@ -267,6 +267,7 @@ The services in this category allow you to track personal and fitness goals util
 * [LearnOSM.org](https://learnosm.org/en/beginner/) - Extensive beginners' guide to editing OpenStreetMap. ([Wiki](https://wiki.openstreetmap.org/wiki/LearnOSM))
 * [What OSM?](https://whatosm.pavie.info/) - Tool for finding tools for contributing to OSM by answering three simple questions.
 * [TeachOSM](https://teachosm.org/) - Project assisting educators at all levels to introduce open source mapping and OpenStreetMap in the classroom. ([Wiki](https://wiki.openstreetmap.org/wiki/TeachOSM))
+* [WeeklyOSM](https://weeklyosm.eu/) - News and updates to inform the community about what is going on in the OSM Universe, from experienced mappers to new OSM members.
 
 ### Wiki-Pages