Merge pull request #923 from jguerder/patch-1

Added mastodon.cx

docs/Using-Mastodon/List-of-Mastodon-instances.md

@@ -7,6 +7,7 @@ There is also a list at [instances.mastodon.xyz](https://instances.mastodon.xyz)
 | -------------|-------------|---|---|
 | [mastodon.social](https://mastodon.social) |Flagship, quick updates|No|No|
 | [securitymastod.one](https://securitymastod.one/) |Information security enthusiasts and pros|Yes|Yes|
+| [mastodon.cx](https://mastodon.cx/) |Alternative Mastodon instance hosted in France|Yes|Yes|
 | [mastodon.network](https://mastodon.network) |N/A|Yes|Yes|
 | [awoo.space](https://awoo.space) |Intentionally moderated, only federates with mastodon.social|Yes|No|
 | [animalliberation.social](https://animalliberation.social) |Animal Rights|Yes|No|