Fix sed expression, adopting pipe '|' as separator

Author: bgandon

out

@@ -194,7 +194,7 @@ done
 
 if [[ "${show_metadata}" == "true" ]]; then
     redacted_webhook_url=$(
-        sed -Ee 's,/([^/.]{2})[^/.]{5,}([^/.]{2}),/\1…\2,g' <<< "${webhook_url}"
+        sed -Ee 's|/([^/.]{2})[^/.]{5,}([^/.]{2})|/\1…\2|g' <<< "${webhook_url}"
     )
     if [[ -n "${text_file}" && -f "${text_file}" ]]; then
         text_file_exists="Yes"