Add back link to #ada-lang:matrix.org in News and Resources section

README.md

@@ -190,7 +190,7 @@ A curated list of awesome resources related to the Ada and SPARK programming lan
 - [acm-sig-ada](https://www.sigada.org/) - The Special Interest Group on Ada.
 - [ada-resource-association](http://www.adaic.org/community/) - Since 1990 the Ada Resource Association’s principal mission has been “To ensure continued success of Ada users and promote Ada use in the software industry”.
 - [ada-information-clearinghouse](http://www.adaic.org/) - News and resources for the Ada programming language.
-- [ada-planet](https://www.laeran.pl/adaplanet/i/) - News Aggregator from the Ada programming language world.
+- [ada-planet](https://www.laeran.pl/adaplanet/i/) - News Aggregator from the Ada programming language world. ([RSS feed via Matrix](https://matrix.to/#/#ada-lang:matrix.org))
 
 #### Competition
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