up drafter fix typo (#955)

.github/release-drafter.yml

@@ -25,7 +25,7 @@ template: |
 
   This product includes GeoLite2 data created by MaxMind, available from <a href="https://www.maxmind.com">https://www.maxmind.com</a>.
   
-  ## Installation installation
+  ## Installation
 
   Take a look at the [installation instructions](https://doc.crowdsec.net/docs/getting_started/install_crowdsec).