Update winkerberos requirement from >=0.5.0 to >=0.12.2 (#2827)

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Iris <iris.ho@mongodb.com>

Author: dependabot[bot]

requirements/gssapi.txt

@@ -1,2 +1,2 @@
 pykerberos>=1.2.4;os.name!='nt'
-winkerberos>=0.5.0;os.name=='nt'
+winkerberos>=0.12.2;os.name=='nt'