[SEMANTIC CONVENTIONS] Update links to openmetrics to reference the v1.0.0 release (open-telemetry#3205)

Author: dashpole

api/include/opentelemetry/semconv/incubating/hw_metrics.h

@@ -132,7 +132,7 @@ static inline nostd::shared_ptr<metrics::ObservableInstrument> CreateAsyncDouble
  * states <p>
  * @code hw.status @endcode is currently specified as an <em>UpDownCounter</em> but would ideally be
  * represented using a <a
- * href="https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#stateset"><em>StateSet</em>
+ * href="https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#stateset"><em>StateSet</em>
  * as defined in OpenMetrics</a>. This semantic convention will be updated once <em>StateSet</em> is
  * specified in OpenTelemetry. This planned change is not expected to have any consequence on the
  * way users query their timeseries backend to retrieve the values of @code hw.status @endcode over