[3.12] Fix incorrect indentation in importlib.metadata.rst (GH-126189) (GH-126194)

Fix incorrect indentation in importlib.metadata.rst (GH-126189)
(cherry picked from commit 6f512c603465ff3e51e07cb7e1d36b4e5e88905d)

Co-authored-by: Rafael Fontenelle <rffontenelle@users.noreply.github.com>