docs: fix broken monitors link and encourage contributions

Co-authored-by: JohnRoesler <19351306+JohnRoesler@users.noreply.github.com>

Author: Copilot

README.md

@@ -173,8 +173,9 @@ Metrics may be collected from the execution of each job and scheduler lifecycle
 - [**Monitor**](https://pkg.go.dev/github.com/go-co-op/gocron/v2#Monitor):
 - [**MonitorStatus**](https://pkg.go.dev/github.com/go-co-op/gocron/v2#MonitorStatus) (includes status and error (if any) of the Job)
 A monitor can be used to collect metrics for each job from a scheduler.
-  - Implementations: [go-co-op monitors](https://github.com/go-co-op?q=-monitor&type=all&language=&sort=)
-    (don't see what you need? request on slack to get a repo created to contribute it!)
+  - **Implementations:** There are currently no open source implementations of the Monitor interface available. 
+    We'd love for you to be the first to contribute one! Check out the [Monitor interface documentation](https://pkg.go.dev/github.com/go-co-op/gocron/v2#Monitor) 
+    to get started, or reach out on [Slack](https://gophers.slack.com/archives/CQ7T0T1FW) if you'd like to discuss your implementation.
 - [**SchedulerMonitor**](https://pkg.go.dev/github.com/go-co-op/gocron/v2#SchedulerMonitor):
 A scheduler monitor provides comprehensive observability into scheduler and job lifecycle events.