Update quick-install.md

doc/quick-install.md

@@ -56,6 +56,12 @@ Enjoy!
 
 ### Install Jigasi
 
+```sh
+apt-get -o Dpkg::Options::="--force-overwrite" -y install jigasi
+```
+
+or
+
 ```sh
 wget https://download.jitsi.org/jigasi_1.0-1_amd64.deb
 dpkg -i --force-overwrite jigasi_1.0-1_amd64.deb