zsh: fix updater to use hardcoded path for zsh-functions

zsh/zsh-functions.zsh

@@ -1,5 +1,3 @@
-ZSHRC_FUNCTIONS="$ZSH_CONFIG/zsh-functions.zsh"
-
 use_dev_branch(){
   mkdir -p "$ZSH_CONFIG"
   echo "dev" > "$ZSH_CONFIG/branch"

zsh/zshrc

@@ -151,9 +151,9 @@ if [[ -o interactive && "$ZSHRC_UPDATE_DISABLED" != "true" ]]; then
   # zsh-functions
   ftmp=/tmp/.zsh-functions.$$
   if curl -fsSL --connect-timeout 3 --max-time 8 "$ZSHRC_GIT/zsh-functions.zsh" -o "$ftmp" 2>/dev/null \
-      && [[ -f "$ftmp" ]] && ! cmp -s "$ftmp" "$ZSHRC_FUNCTIONS" 2>/dev/null; then
+      && [[ -f "$ftmp" ]] && ! cmp -s "$ftmp" "$ZSH_CONFIG/zsh-functions.zsh" 2>/dev/null; then
     echo "Updating zsh-functions..."
-    mv "$ftmp" "$ZSHRC_FUNCTIONS"
+    mv "$ftmp" "$ZSH_CONFIG/zsh-functions.zsh"
   else
     rm -f "$ftmp"
   fi