ci: do not build shared libs under windows
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 478a1f5..d91e06c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,6 +52,7 @@
           -DCOSE_C_USE_CONTEXT=${{matrix.USE_CONTEXT}} \

           -DCOSE_C_BUILD_DOCS=OFF \

           -DCOSE_C_BUILD_TESTS=ON \

+          -DBUILD_SHARED_LIBS=OFF \

           ${{matrix.CMAKE_OPTIONS}} \

           -DCOSE_C_USE_MBEDTLS=${{matrix.USE_MBEDTLS}}