Changes needed for compilation with MSVC in Windows: small change to SfStrategy type alias.
Changes needed for compilation with MSVC in Windows: small change to SfStrategy type alias.

PiperOrigin-RevId: 418754126
Change-Id: Idd2c7d35c0a245efd00f52a27304b15449c02b53

deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel,deepmind/open_spiel