update readme badges

README.md

@@ -1,11 +1,13 @@
 # go-systemd
 
-[![Go Report Card](https://goreportcard.com/badge/github.com/iguanesolutions/go-systemd)](https://goreportcard.com/report/github.com/iguanesolutions/go-systemd) [![GoDoc](https://godoc.org/github.com/iguanesolutions/go-systemd?status.svg)](https://godoc.org/github.com/iguanesolutions/go-systemd)
+[![Go Report Card](https://goreportcard.com/badge/github.com/iguanesolutions/go-systemd)](https://goreportcard.com/report/github.com/iguanesolutions/go-systemd) [![PkgGoDev](https://pkg.go.dev/badge/github.com/iguanesolutions/go-systemd/v5)](https://pkg.go.dev/github.com/iguanesolutions/go-systemd/v5)
 
 Easily communicate with systemd when run as daemon within a service unit.
 
 ## Notifier
 
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/iguanesolutions/go-systemd/v5/notify)](https://pkg.go.dev/github.com/iguanesolutions/go-systemd/v5/notify)
+
 With notifier you can notify to systemd that your program is starting, stopping, reloading...
 
 For example, if your daemon needs some time for initializing its controllers before really being considered as ready, you can specify to systemd that this is a "notify" service and send it a notification when ready.
@@ -93,7 +95,9 @@ user@host:~$ systemctl status superapp.service
    ...
 ```
 
-## Watchdog
+### Watchdog
+
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/iguanesolutions/go-systemd/v5/notify/watchdog)](https://pkg.go.dev/github.com/iguanesolutions/go-systemd/v5/notify/watchdog)
 
 ```systemdunit
 [Service]