Shorten script name for Go Git

Install/Templates/fish/functions/cdg.fish

@@ -1,4 +1,4 @@
-function cdg --description 'Go to root folder of the current Git repository'
+function gg --description 'Go to root folder of the current Git repository'
     if set -l GIT_ROOT (git rev-parse --show-toplevel)
 		cd $GIT_ROOT
 	end