feat: brief should not have empty sections

[rebelchris]

We should not render empty brief sections. (Email already removes them)

[pulumi]

🍹 The Update (preview) for dailydotdev/api/prod (at 67be818) was successful.

Resource Changes

    Name                                                   Type                           Operation
~   vpc-native-update-views-cron                           kubernetes:batch/v1:CronJob    update
~   vpc-native-calculate-top-readers-cron                  kubernetes:batch/v1:CronJob    update
~   vpc-native-update-tags-str-cron                        kubernetes:batch/v1:CronJob    update
~   vpc-native-clean-stale-user-transactions-cron          kubernetes:batch/v1:CronJob    update
~   vpc-native-ws-deployment                               kubernetes:apps/v1:Deployment  update
~   vpc-native-clean-zombie-users-cron                     kubernetes:batch/v1:CronJob    update
~   vpc-native-bg-deployment                               kubernetes:apps/v1:Deployment  update
~   vpc-native-check-analytics-report-cron                 kubernetes:batch/v1:CronJob    update
~   vpc-native-private-deployment                          kubernetes:apps/v1:Deployment  update
~   vpc-native-post-analytics-history-day-clickhouse-cron  kubernetes:batch/v1:CronJob    update
+   vpc-native-api-clickhouse-migration-cd9d508c           kubernetes:batch/v1:Job        create
~   vpc-native-update-highlighted-views-cron               kubernetes:batch/v1:CronJob    update
~   vpc-native-validate-active-users-cron                  kubernetes:batch/v1:CronJob    update
~   vpc-native-personalized-digest-cron                    kubernetes:batch/v1:CronJob    update
~   vpc-native-clean-gifted-plus-cron                      kubernetes:batch/v1:CronJob    update
~   vpc-native-daily-digest-cron                           kubernetes:batch/v1:CronJob    update
~   vpc-native-update-source-public-threshold-cron         kubernetes:batch/v1:CronJob    update
-   vpc-native-api-clickhouse-migration-7da20508           kubernetes:batch/v1:Job        delete
~   vpc-native-deployment                                  kubernetes:apps/v1:Deployment  update
~   vpc-native-update-source-tag-view-cron                 kubernetes:batch/v1:CronJob    update
~   vpc-native-update-trending-cron                        kubernetes:batch/v1:CronJob    update
~   vpc-native-sync-subscription-with-cio-cron             kubernetes:batch/v1:CronJob    update
-   vpc-native-api-db-migration-7da20508                   kubernetes:batch/v1:Job        delete
~   vpc-native-update-current-streak-cron                  kubernetes:batch/v1:CronJob    update
~   vpc-native-clean-zombie-images-cron                    kubernetes:batch/v1:CronJob    update
~   vpc-native-personalized-digest-deployment              kubernetes:apps/v1:Deployment  update
~   vpc-native-update-tag-recommendations-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-generate-search-invites-cron                kubernetes:batch/v1:CronJob    update
+   vpc-native-api-db-migration-cd9d508c                   kubernetes:batch/v1:Job        create
~   vpc-native-temporal-deployment                         kubernetes:apps/v1:Deployment  update
~   vpc-native-clean-zombie-user-companies-cron            kubernetes:batch/v1:CronJob    update
~   vpc-native-hourly-notification-cron                    kubernetes:batch/v1:CronJob    update