.github/workflows/ci-cygwin-*.yml: Use configure --enable-fat-binary - the environment variable SAGE_FAT_BINARY is not passed through tox

Author: Matthias Koeppe

.github/workflows/ci-cygwin-minimal.yml

@@ -15,8 +15,7 @@ env:
   SAGE_CHECK: warn
   SAGE_CHECK_PACKAGES: "!cython,!r,!python3,!nose,!pathpy,!gap,!cysignals,!linbox,!git,!ppl"
   CYGWIN: winsymlinks:native
-  CONFIGURE_ARGS: --enable-experimental-packages --enable-download-from-upstream-url
-  SAGE_FAT_BINARY: yes
+  CONFIGURE_ARGS: --enable-experimental-packages --enable-download-from-upstream-url --enable-fat-binary
   SAGE_LOCAL: /opt/sage-${{ github.sha }}
 
 jobs:

.github/workflows/ci-cygwin-standard.yml

@@ -15,8 +15,7 @@ env:
   SAGE_CHECK: warn
   SAGE_CHECK_PACKAGES: "!cython,!r,!python3,!nose,!pathpy,!gap,!cysignals,!linbox,!git,!ppl"
   CYGWIN: winsymlinks:native
-  CONFIGURE_ARGS: --enable-experimental-packages --enable-download-from-upstream-url
-  SAGE_FAT_BINARY: yes
+  CONFIGURE_ARGS: --enable-experimental-packages --enable-download-from-upstream-url --enable-fat-binary
   SAGE_LOCAL: /opt/sage-${{ github.sha }}
 
 jobs: