Test Go unstable version 1.26rc3

See the draft release notes: https://tip.golang.org/doc/go1.26.

Author: arnested

go.mod

@@ -1,6 +1,6 @@
 module github.com/arnested/systemd-state
 
-go 1.25.7
+go 1.26rc3
 
 require (
 	github.com/coreos/go-systemd/v22 v22.7.0