Update links to openmetrics to reference the v1.0.0 release (#36825)

Related to prometheus/OpenMetrics#287

The OM 2.0 effort is kicked off, and will start developing on main. This
updates the links to OpenMetrics to reference the 1.0 release. The OM
project has also been moved into the prometheus github org.

pkg/translator/prometheus/normalize_name.go

@@ -15,7 +15,7 @@ import (
 // OTLP metrics use the c/s notation as specified at https://ucum.org/ucum.html
 // (See also https://github.com/open-telemetry/semantic-conventions/blob/main/docs/general/metrics.md#instrument-units)
 // Prometheus best practices for units: https://prometheus.io/docs/practices/naming/#base-units
-// OpenMetrics specification for units: https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#units-and-base-units
+// OpenMetrics specification for units: https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#units-and-base-units
 var unitMap = map[string]string{
 	// Time
 	"d":   "days",

pkg/translator/prometheusremotewrite/helper.go

@@ -37,7 +37,7 @@ const (
 	createdSuffix = "_created"
 	// maxExemplarRunes is the maximum number of UTF-8 exemplar characters
 	// according to the prometheus specification
-	// https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#exemplars
+	// https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#exemplars
 	maxExemplarRunes = 128
 	infoType         = "info"
 )