Update pirate party list

caramba/README.MD

@@ -38,6 +38,7 @@
 |[tv.pirati.cz](https://tv.pirati.cz)|Czech republic|PeerTube|
 |[mastodon.pirati.cz](https://mastodon.pirati.cz)|Czech republic|Mastodon|
 |[piraten-partei.social](https://piraten-partei.social)|Germany|Mastodon|
+|[piratenpartei.social](https://piratenpartei.social)|Germany|Friendica|
 |[piraten.space](https://piraten.space)|Koeln|PeerTube|
 |[pirati.ca](https://pirati.ca)|-|Friendica|
 |[pirati.cc](https://pirati.cc/main/all)|-|GNU Social|