fixed syntax error

content/en/articles/defense-of-gpg.md

@@ -58,7 +58,7 @@ In every "GPG is dead" cry almost always includes some **killer** new technology
 
 ## Signal
 
-A big hit in secure instant messaging. Signal is build upon proprietary software Textsecure and RedPhone that had been once developed by [Moxie Merlinspike](https://en.wikipedia.org/wiki/Moxie_Marlinspike) and his co-founder Stuart Anderson. Signal Protocol utilizing [double ratchet](https://en.wikipedia.org/wiki/Double_Ratchet_Algorithm) encryption is a game changer for modern connectivity and implemented in [several applications[(https://signal.org/blog/whatsapp-complete/). Signal applications and server code is free software but [their developers and business model is not](https://oyd.org.tr/en/articles/stop-saying-freedom-is-a-private-matter/). It is [yet another walled garden with no federation](#https://matrix.org/blog/2020/01/02/on-privacy-versus-freedom/) and [claiming GPG is dead](https://moxie.org/blog/gpg-and-me/).
+A big hit in secure instant messaging. Signal is build upon proprietary software Textsecure and RedPhone that had been once developed by [Moxie Merlinspike](https://en.wikipedia.org/wiki/Moxie_Marlinspike) and his co-founder Stuart Anderson. Signal Protocol utilizing [double ratchet](https://en.wikipedia.org/wiki/Double_Ratchet_Algorithm) encryption is a game changer for modern connectivity and implemented in [several applications](https://signal.org/blog/whatsapp-complete/). Signal applications and server code is free software but [their developers and business model is not](https://oyd.org.tr/en/articles/stop-saying-freedom-is-a-private-matter/). It is [yet another walled garden with no federation](#https://matrix.org/blog/2020/01/02/on-privacy-versus-freedom/) and [claiming GPG is dead](https://moxie.org/blog/gpg-and-me/).
 
 ## Matrix Protocol