config/containers-and-vms/chroot: deconflict headings

having the exact same name caused the anchor slug to be duplicated,
leading to links pointing to the wrong section in the chroot and FDE
install guides

fixes #755

Author: classabbyamp

src/config/containers-and-vms/chroot.md

@@ -21,7 +21,7 @@ used to create the chroot:
 `<other_pkgs>` is only needed if you want to pre-install other packages in the
 chroot.
 
-### Manual Method
+### Manual Creation
 
 Alternatively, this process can be done manually.