Add Nothing2Hide as training organization

wiki/src/support/learn.mdwn

@@ -69,6 +69,11 @@ can complete this list.
     individuals who value their online and offline privacy.
   - Email: <contact@montpel-libre.fr>
 
+* [Nothing2Hide](https://nothing2hide.org/)
+  - Location: Paris, France
+  - We provide digital safety trainings for journalists and human right defenders.
+  - [Contact page](https://nothing2hide.org/en/contact/)
+
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 Training material