python3-importlib-metadata: upgrade 5.2.0 -> 6.0.0

python3-importlib-metadata: upgrade 5.2.0 -> 6.0.0

Changelog:
===========
* #419: Declared "Distribution" as an abstract class, enforcing
  definition of abstract methods in instantiated subclasses. It's no
  longer possible to instantiate a "Distribution" or any subclasses
  unless they define the abstract methods.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>