chore: use slog instead gokit for logging style (#1737)

Signed-off-by: Jan-Otto Kröpke <[email protected]>

internal/log/logger.go

@@ -63,7 +63,7 @@ func New(config *Config) (*slog.Logger, error) {
 	}
 
 	config.Config.Writer = config.File.w
-	config.Config.Style = promslog.GoKitStyle
+	config.Config.Style = promslog.SlogStyle
 
 	return promslog.New(config.Config), nil
 }