src/poky:python3-importlib-metadata: upgrade 6.0.0 -> 6.2.0

Changelog:
===========
- #384: PackageMetadata now stipulates an additional get method allowing for
  easy querying of metadata keys that may not be present.
- #428: packages_distributions now honors packages and modules with Python
  modules that not .py sources (e.g. .pyc, .so).
- #434: Expand protocol for PackageMetadata.get_all to match the upstream
  implementation of email.message.Message.get_all in python/typeshed#9620.

(From OE-Core rev: e3991141939e5e2393cf36edd02ef3765cacd330)

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