Temporarily disable cargo-c build for windows, as it is broken

Author: shssoichiro

.github/workflows/rav1e.yml

@@ -273,8 +273,8 @@ jobs:
            toolchain: stable
          - conf: cargo-test
            toolchain: stable
-         - conf: cargo-c
-           toolchain: stable-x86_64-pc-windows-gnu
+#         - conf: cargo-c
+#           toolchain: stable-x86_64-pc-windows-gnu
 
     env:
       RUST_BACKTRACE: 1