[release] v1.30.3 - Fetch download_config_specs from cdn by default (#245)

### Improvements
- Fetch DCS payload from cdn by default. This will improve reliability
and latency of initialization and background updates






>Included In This Release
>- a105bb0 Xin Li
>   - fix: Default hit cdn for dcs (#244)

Author: xinlili-statsig

statsig_metadata.go

@@ -14,7 +14,7 @@ type statsigMetadata struct {
 func getStatsigMetadata() statsigMetadata {
 	return statsigMetadata{
 		SDKType:         "go-sdk",
-		SDKVersion:      "v1.30.2",
+		SDKVersion:      "v1.30.3",
 		LanguageVersion: runtime.Version()[2:],
 		SessionID:       SessionID(),
 	}