fix(ci): sanitize env for asciinema upload

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}
+
+env -i HOME="$HOME" PATH="$PATH" TERM="$TERM" \
+screencast=${WKDIR}/${DEMO_NAME}.cast \
+${WKDIR}/asciinema-rec_script ${SCRIPTPATH}/${DEMO_SCRIPT}
 
 if [ -n "${UPLOAD-}" ]; then
   asciinema upload ${WKDIR}/${DEMO_NAME}.cast