update git log alias

gitconfig

@@ -2,13 +2,7 @@
 	name = Sami Samhuri
 	email = sami@samhuri.net
 [alias]
-	lg = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr)%Creset' --abbrev-commit --date=relative
-	co = checkout
-	b = branch
-	d = diff
-	lo = log --oneline
-	a = add
-	c = commit
+    l = log --graph --abbrev-commit --date=relative --pretty=format:'%Cred%h%Creset %C(yellow)%d%Creset %s %Cgreen(%an, %C(bold green)%cr%Cgreen)%Creset'
 	g = grep --break --heading --line-number
 [push]
 	default = upstream