fix: add slack webhook for match accepted

[rebelchris]

Slack hook for when user accepts a opportunity :)
Ideally should be new webhook endpoint.

[pulumi]

🍹 The Update (preview) for dailydotdev/api/prod (at d4a04aa) was successful.

Resource Changes

    Name                                                   Type                                  Operation
-   vpc-native-api-clickhouse-migration-bba377a3           kubernetes:batch/v1:Job               delete
~   vpc-native-temporal-deployment                         kubernetes:apps/v1:Deployment         update
+   vpc-native-api-db-migration-4decd8f2                   kubernetes:batch/v1:Job               create
~   vpc-native-calculate-top-readers-cron                  kubernetes:batch/v1:CronJob           update
~   vpc-native-update-tag-recommendations-cron             kubernetes:batch/v1:CronJob           update
~   vpc-native-check-analytics-report-cron                 kubernetes:batch/v1:CronJob           update
~   vpc-native-update-tags-str-cron                        kubernetes:batch/v1:CronJob           update
~   vpc-native-generate-search-invites-cron                kubernetes:batch/v1:CronJob           update
~   vpc-native-bg-deployment                               kubernetes:apps/v1:Deployment         update
~   vpc-native-sync-subscription-with-cio-cron             kubernetes:batch/v1:CronJob           update
~   vpc-native-personalized-digest-deployment              kubernetes:apps/v1:Deployment         update
~   vpc-native-clean-zombie-images-cron                    kubernetes:batch/v1:CronJob           update
~   vpc-native-update-source-public-threshold-cron         kubernetes:batch/v1:CronJob           update
~   vpc-native-ws-deployment                               kubernetes:apps/v1:Deployment         update
+   vpc-native-api-clickhouse-migration-4decd8f2           kubernetes:batch/v1:Job               create
~   vpc-native-update-trending-cron                        kubernetes:batch/v1:CronJob           update
~   vpc-native-clean-zombie-users-cron                     kubernetes:batch/v1:CronJob           update
~   vpc-native-validate-active-users-cron                  kubernetes:batch/v1:CronJob           update
~   vpc-native-clean-gifted-plus-cron                      kubernetes:batch/v1:CronJob           update
~   vpc-native-post-analytics-history-day-clickhouse-cron  kubernetes:batch/v1:CronJob           update
~   vpc-native-update-highlighted-views-cron               kubernetes:batch/v1:CronJob           update
~   vpc-native-hourly-notification-cron                    kubernetes:batch/v1:CronJob           update
+   api-sub-api.candidate-accepted-opportunity-slack       gcp:pubsub/subscription:Subscription  create
~   vpc-native-private-deployment                          kubernetes:apps/v1:Deployment         update
-   vpc-native-api-db-migration-bba377a3                   kubernetes:batch/v1:Job               delete
~   vpc-native-update-current-streak-cron                  kubernetes:batch/v1:CronJob           update
~   vpc-native-generic-referral-reminder-cron              kubernetes:batch/v1:CronJob           update
~   vpc-native-post-analytics-clickhouse-cron              kubernetes:batch/v1:CronJob           update
+-  vpc-native-k8s-secret                                  kubernetes:core/v1:Secret             create-replacement
~   vpc-native-update-views-cron                           kubernetes:batch/v1:CronJob           update
~   vpc-native-update-source-tag-view-cron                 kubernetes:batch/v1:CronJob           update
~   vpc-native-deployment                                  kubernetes:apps/v1:Deployment         update
~   vpc-native-clean-zombie-user-companies-cron            kubernetes:batch/v1:CronJob           update
~   vpc-native-daily-digest-cron                           kubernetes:batch/v1:CronJob           update
~   vpc-native-personalized-digest-cron                    kubernetes:batch/v1:CronJob           update
~   vpc-native-clean-stale-user-transactions-cron          kubernetes:batch/v1:CronJob           update