git:zsh-autoload: Use relative scripts/ folder

This makes it a bit more agnostic to the type of scripts being used.

.config/git/zsh-autoload.sh

@@ -2,8 +2,9 @@
 # SPDX-License-Identifier: MIT
 # Copyright (c) 2025 Julian Prein
 #
-# Meant to be used in git aliases to launch an autoloadable zsh function in the
-# correct directory.
+# Meant to be used by git aliases to easily launch an external script from the
+# ./scripts/ collection through its basename and in the correct directory (i.e.
+# GIT_PREFIX).
 
 if [ $# -eq 0 ]; then
 	printf >&2 "Usage: %s <function>\n" "$(basename "$0")"
@@ -12,7 +13,7 @@ fi
 name="$1"
 shift
 
-BASE="${XDG_CONFIG_HOME:-$HOME/.config}/zsh/autoload/git"
+BASE="$(dirname "$(realpath "$0")")/scripts"
 
 # In git aliases, shell commands are executed from the top-level directory of
 # the repo. GIT_PREFIX contains the original directory relative to the