Update READme.md

Author: legah2045

soarQube-Installation/READme.md

@@ -21,6 +21,7 @@
 sudo useradd sonar
 # Grand sudo access to sonar user
 sudo echo "sonar ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/sonar
+# set hostname for the sonarqube server
 sudo hostnamectl set-hostname sonar 
 sudo su - sonar
 ```