[newlib-cygwin] Cygwin: CI: Fix thinko of 'ncores' for 'nproc'

[Jon Turney]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=b5d4245d5f99b61a64e65be45872a2f56fd3e37e

commit b5d4245d5f99b61a64e65be45872a2f56fd3e37e
Author: Jon Turney <jon.turney@dronecode.org.uk>
Date:   Thu Sep 1 14:07:26 2022 +0100

    Cygwin: CI: Fix thinko of 'ncores' for 'nproc'

Diff:
---
 .github/workflows/cygwin.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin.yml b/.github/workflows/cygwin.yml
index 7ad5ccf5f..ac167e748 100644
--- a/.github/workflows/cygwin.yml
+++ b/.github/workflows/cygwin.yml
@@ -101,7 +101,7 @@ jobs:
         (cd winsup; ./autogen.sh) &&
         cd build &&
         ../configure --prefix=$(realpath $(pwd)/../install) -v &&
-        export MAKEFLAGS=-j$(ncores) &&
+        export MAKEFLAGS=-j$(nproc) &&
         make &&
         make install &&
         (cd */newlib; make info man) &&