RSDK-9060: Fix docstring for FirstRunTimeout (#4533)

config/module.go

@@ -50,10 +50,11 @@ type Module struct {
 	Environment map[string]string `json:"env,omitempty"`
 
 	// FirstRunTimeout is the timeout duration for the first run script.
-	// Setting this field to a zero value (e.g. 0 * [time.Second]) will
-	// set the first run timeout to the default value of 1 hour, which
-	// is equivalent to leaving this field unset. If you wish to set an
-	// immediate timeout you can set this field to a negative value.
+	// This field will only be applied if it is a positive value. Supplying a
+	// non-positive will set the first run timeout to the default value of 1 hour,
+	// which is equivalent to leaving this field unset. If you wish to set an
+	// immediate timeout you should set this field to a very small positive value
+	// such as "1ns".
 	FirstRunTimeout goutils.Duration `json:"first_run_timeout,omitempty"`
 
 	// Status refers to the validations done in the APP to make sure a module is configured correctly