chore: fix broken link (#4209)

specification/metrics/data-model.md

@@ -1014,7 +1014,7 @@ If this flag is set on a data point, then this data point reflects explicitly
 missing data in a series. It serves as an indicator that a previously present
 timeseries was removed and that this timeseries SHOULD NOT be returned in
 queries after such an indicator was received. It is an equivalent of the
-[Prometheus staleness marker](https://prometheus.io/docs/prometheus/2.52/querying/basics/#staleness).
+[Prometheus staleness marker](https://prometheus.io/docs/prometheus/latest/querying/basics/#staleness).
 
 If this flag is set, all other data point properties except attributes, time
 stamps, or time windows, SHOULD be ignored.