windows.h header should be lowercase to avoid issues when (#5712)
windows.h header should be lowercase to avoid issues when (#5712)

cross-compiling on Linux
bp-kelley/rdkit,ptosco/rdkit,ptosco/rdkit,ptosco/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,rdkit/rdkit,bp-kelley/rdkit,bp-kelley/rdkit,rdkit/rdkit,rdkit/rdkit,ptosco/rdkit,bp-kelley/rdkit,rdkit/rdkit,ptosco/rdkit,rdkit/rdkit,ptosco/rdkit,rdkit/rdkit,bp-kelley/rdkit,ptosco/rdkit,rdkit/rdkit,bp-kelley/rdkit