Skip dotnet_bridge in CI

Author: bdcbqa314159

examples/dotnet_bridge/CMakeLists.txt

@@ -1,5 +1,5 @@
-if(NOT MSVC)
-    message(STATUS "Skipping dotnet_bridge example (requires MSVC for /clr)")
+if(NOT MSVC OR DEFINED ENV{CI})
+    message(STATUS "Skipping dotnet_bridge example (requires MSVC with .NET Framework, not available in CI)")
     return()
 endif()