docs: bump metric version since we are also updating go.opentelemetry…

….io/otel/metric to v1.34.0;

metric/version.go

@@ -2,5 +2,5 @@ package metric
 
 // Version is the current release version of metrics package.
 func Version() string {
-	return "0.1.0"
+	return "0.2.0"
 }