Change file type to non-GWAS-SSF for 2 studies GCST90328147 and GCST90328148

[Santhi1901]

The current file type for these 2 studies is GWAS-SSF, as the user has populated the beta and SE columns with values '0', and the z-score column is provided after the p-value column. The file type should be changed to a non-GWAS-SSF.