fix(ci): Fix demo-update command by sanitize env for asciinema upload

Change script that generates demo to cleanup envvars to avoid
issue faced in the CI to upload the records.

Author: camilamacedo86

hack/demo/generate-asciidemo.sh

@@ -83,7 +83,10 @@ done
 
 curl https://raw.githubusercontent.com/zechris/asciinema-rec_script/main/bin/asciinema-rec_script -o ${WKDIR}/asciinema-rec_script
 chmod +x ${WKDIR}/asciinema-rec_script
-screencast=${WKDIR}/${DEMO_NAME}.cast ${WKDIR}/asciinema-rec_script ${SCRIPTPATH}/${DEMO_SCRIPT}
+# Dynamically build clean env and eval the call
+ENV_EXPORTS=$(env | awk -F= '{ if ($2 ~ /^[^"]*$/) print "export " $1"=\"" $2 "\"" }')
+eval "${ENV_EXPORTS}
+screencast=${WKDIR}/${DEMO_NAME}.cast ${WKDIR}/asciinema-rec_script ${SCRIPTPATH}/${DEMO_SCRIPT}"
 
 if [ -n "${UPLOAD-}" ]; then
   asciinema upload ${WKDIR}/${DEMO_NAME}.cast