fix: allow empty checksums for pkgconfiglite on Windows CI

Chocolatey now blocks HTTP downloads without checksums by default.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jamestjsp

.github/workflows/build.yml

@@ -61,7 +61,7 @@ jobs:
           CIBW_MUSLLINUX_X86_64_IMAGE: musllinux_1_2
           CIBW_MUSLLINUX_AARCH64_IMAGE: musllinux_1_2
           CIBW_BEFORE_ALL_LINUX: (dnf install -y openblas-devel 2>/dev/null || yum install -y openblas-devel 2>/dev/null || apk add openblas-dev 2>/dev/null) || true
-          CIBW_BEFORE_ALL_WINDOWS: choco install -y pkgconfiglite
+          CIBW_BEFORE_ALL_WINDOWS: choco install -y pkgconfiglite --allow-empty-checksums
           CIBW_ENVIRONMENT_LINUX: PKG_CONFIG_PATH=/tmp/openblas
           CIBW_ENVIRONMENT_MACOS: MACOSX_DEPLOYMENT_TARGET=11.0 PKG_CONFIG_PATH=/tmp/openblas
           CIBW_BEFORE_BUILD_LINUX: pip install scipy-openblas32 && mkdir -p /tmp/openblas && python -c "import scipy_openblas32 as sc; open('/tmp/openblas/openblas.pc','w').write(sc.get_pkg_config())" || true