Diagnostics: change log level (#11048)

Put log level as Debug to silence warning for now. This bit requires
refactor as I realized that two stages can run at the same time. It
should close - #10988

erigon-lib/diagnostics/snapshots.go

@@ -124,7 +124,7 @@ func GetShanpshotsPercentDownloaded(downloaded uint64, total uint64, torrentMeta
 func (d *DiagnosticClient) updateSnapshotStageStats(stats SyncStageStats, subStageInfo string) {
 	idxs := d.GetCurrentSyncIdxs()
 	if idxs.Stage == -1 || idxs.SubStage == -1 {
-		log.Warn("[Diagnostics] Can't find running stage or substage while updating Snapshots stage stats.", "stages:", d.syncStages, "stats:", stats, "subStageInfo:", subStageInfo)
+		log.Debug("[Diagnostics] Can't find running stage or substage while updating Snapshots stage stats.", "stages:", d.syncStages, "stats:", stats, "subStageInfo:", subStageInfo)
 		return
 	}