chore(sources/env): bump gosettings to v0.3.0-rc9

internal/configuration/sources/env/dot.go

@@ -1,8 +1,6 @@
 package env
 
 import (
-	"fmt"
-
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gosettings/sources/env"
 )
@@ -10,12 +8,12 @@ import (
 func (s *Source) readDoT() (dot settings.DoT, err error) {
 	dot.Enabled, err = env.BoolPtr("DOT")
 	if err != nil {
-		return dot, fmt.Errorf("environment variable DOT: %w", err)
+		return dot, err
 	}
 
 	dot.UpdatePeriod, err = env.DurationPtr("DNS_UPDATE_PERIOD")
 	if err != nil {
-		return dot, fmt.Errorf("environment variable DNS_UPDATE_PERIOD: %w", err)
+		return dot, err
 	}
 
 	dot.Unbound, err = readUnbound()