Update slack integration data

curl --location --request PUT 'https://api.probely.com/targets//integrations/slack/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "notify_finding_fixed": false,
    "notify_high_findings": false,
    "notify_low_findings": false,
    "notify_medium_findings": false,
    "notify_scan_completed": false,
    "notify_scan_started": false,
    "webhook_url": ""
}'