Rollback default branch name to master (#1589)

utils/installer/install.sh

@@ -2,7 +2,7 @@
 set -eo pipefail
 
 #Set branch to master unless specified by the user
-declare LV_BRANCH="${LV_BRANCH:-"rolling"}"
+declare LV_BRANCH="${LV_BRANCH:-"master"}"
 declare -r LV_REMOTE="${LV_REMOTE:-lunarvim/lunarvim.git}"
 declare -r INSTALL_PREFIX="${INSTALL_PREFIX:-"$HOME/.local"}"