Finalize FreeBSD CI

.github/scripts/env.sh

@@ -9,6 +9,10 @@ fi
 export DEBIAN_FRONTEND=noninteractive
 export TZ=Asia/Singapore
 
+if [ "${RUNNER_OS}" = "freebsd" ] ; then
+    export RUNNER_OS=FreeBSD
+fi
+
 export OS="$RUNNER_OS"
 export PATH="$HOME/.local/bin:$PATH"