codesigning: Use SHA256 as digest for osslsigncode (Windows)

contrib/windeploy/detached-sig-create.sh

@@ -25,7 +25,7 @@ CERTFILE="win-codesign.cert"
 mkdir -p "${OUTSUBDIR}"
 basename -a $(ls -1 "${SRCDIR}"/*-unsigned.exe) | while read UNSIGNED; do
   echo Signing "${UNSIGNED}"
-  "${OSSLSIGNCODE}" sign -certs "${CERTFILE}" -t "${TIMESERVER}" -in "${SRCDIR}/${UNSIGNED}" -out "${WORKDIR}/${UNSIGNED}" "$@"
+  "${OSSLSIGNCODE}" sign -certs "${CERTFILE}" -t "${TIMESERVER}" -h sha256 -in "${SRCDIR}/${UNSIGNED}" -out "${WORKDIR}/${UNSIGNED}" "$@"
   "${OSSLSIGNCODE}" extract-signature -pem -in "${WORKDIR}/${UNSIGNED}" -out "${OUTSUBDIR}/${UNSIGNED}.pem" && rm "${WORKDIR}/${UNSIGNED}"
 done