Windows runner samos.sln build using bash shell

Author: sjanzou

.github/workflows/ci.yml

@@ -390,7 +390,7 @@ jobs:
         mkdir build
         cd build
         cmake -G "Visual Studio 17 2022" -DCMAKE_CONFIGURATION_TYPES="Release" -DCMAKE_SYSTEM_VERSION=10 -DSAMAPI_EXPORT=0 -DCMAKE_SYSTEM_PREFIX_PATH=${ORTOOLSDIR} -Dabsl_DIR=${ORTOOLSDIR}\lib\cmake\absl" -Dutf8_range_DIR=${ORTOOLSDIR}\lib\cmake\utf8_range" ..
-        MSBuild.exe ./samos.sln /t:Build /p:Configuration=Release
+        MSBuild.exe ./samos.sln \/t:Build \/p:Configuration=Release
 
     # - name: Download RunProcess
     #   shell: bash {0}