feat(aspen/system): Use space as vim leader

For the rare times I still occasionally use vim

Change-Id: Ie3059ab0ec5d5ace729e78b765f251d1fafdfac1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11305
Reviewed-by: aspen <root@gws.fyi>
Autosubmit: aspen <root@gws.fyi>
Tested-by: BuildkiteCI

users/aspen/system/home/modules/vimrc

@@ -22,7 +22,7 @@ set expandtab
 set noerrorbells visualbell t_vb=
 set laststatus=2
 set hidden
-let mapleader = ','
+let mapleader = ' '
 let maplocalleader = '\'
 set undofile
 " set undodir=~/.vim/undo