docs: disambiguate cross-references

docs: disambiguate cross-references

The next patch will engage the qapidoc transmogrifier, which creates a
lot of cross-reference targets. Some of the existing targets
("migration", "qom", "replay") will become ambiguous as a result. Nail
them down more explicitly to prevent ambiguous cross-reference warnings.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-ID: <20250311034303.75779-61-jsnow@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>