Testing shared libraries does not work on Windows

[MLopez-Ibanez]

See the FIXME notes here:

moocore/.github/workflows/C.yml

Lines 87 to 98 in 2101cc8

	# FIXME: Building shared libraries fails on windows. Not sure how to fix it.
	os: [ubuntu-22.04 ] # FIXME: , windows-latest]
	cc: [ gcc ]
	cxx: [ g++ ]
	include: # macos-13 is an intel runner, macos-14 is apple silicon
	- { os: macos-13, cc: clang, cxx: clang++ }
	- { os: macos-13, cc: gcc-12, cxx: g++-12 }
	- { os: macos-14, cc: clang, cxx: clang++ }
	- { os: macos-14, cc: gcc-13, cxx: g++-13 }
	# FIXME:
	# - { os: windows-latest, cc: clang, cxx: clang++ }