pg_cron 1.6.5

[bayandin]

Created with brew bump-formula-pr.

release notes

## What's Changed
* Fix superuser check before adding job to CronJobHash by @CyberDem0n in https://github.com/citusdata/pg_cron/pull/367
* Fix leap year scheduling problem by @zhjwpku in https://github.com/citusdata/pg_cron/pull/365
* Fix possible buffer underflow issue in cron parsing by @marcoslot in https://github.com/citusdata/pg_cron/commit/5c10a8a24527b79c301eaeb04317846f2426dcd5
* Fix compilation warnings by @reshke in https://github.com/citusdata/pg_cron/pull/363
New Contributors

@hari90 made their first contribution in Add YugabyteDB to list of supported services citusdata/pg_cron#330
@Chrismelba-Instaclustr made their first contribution in Updated readme to show that Instaclustr now supports pg_cron citusdata/pg_cron#348
@reshke made their first contribution in Fix maybe-uninitialized compile warn. citusdata/pg_cron#363

Full Changelog: citusdata/pg_cron@v1.6.4...v1.6.5