zsh: Update m alias

Update the `m` alias to use a Makefile within the notes directory if
there is one, otherwise default to one in the current directory.

tag-zsh/zsh/configs/aliases.zsh

@@ -1,6 +1,6 @@
 alias c="clear"
 alias l="ls -lah"
-alias m=make
+alias m="if [[ -f .notes/Makefile ]]; then make -f .notes/Makefile; else make; fi"
 alias mkdir="mkdir -p"
 alias s=symfony
 alias v=vagrant