fix: disable use of prepare-commit-msg hook

Causing issues when doing an amend and also is not desired as it doesn't
allow including many scripts to be run in a hook stage.

files/git/.config/git/template/hooks/prepare-commit-msg.sample

@@ -34,7 +34,8 @@ sed -i'' \
 ## Replace init.template comment char to the core.commentChar line per line.
 if test -f "${template}"; then
   while read -r line; do
-    mod_line="$(printf '%s\n' "${line}" | sed -e "s/^. /${char} /")"
+    mod_line="${line#* }"
+    mod_line="${char} ${mod_line}"
     sed -i'' -e "s/^${line}$/${mod_line}/" -- "${file}"
   done < "${template}"
 fi