chore: fix function name and struct name in comment (#15827)

Signed-off-by: piguagua <piguagua@aliyun.com>

tsdb/record/record_test.go

@@ -476,7 +476,7 @@ type recordsMaker struct {
 	make refsCreateFn
 }
 
-// BenchmarkWAL_HistogramLog measures efficiency of encoding classic
+// BenchmarkWAL_HistogramEncoding measures efficiency of encoding classic
 // histograms and native historgrams with custom buckets (NHCB).
 func BenchmarkWAL_HistogramEncoding(b *testing.B) {
 	initClassicRefs := func(labelCount, histograms, buckets int) (series []RefSeries, floatSamples []RefSample, histSamples []RefHistogramSample) {

web/api/v1/errors_test.go

@@ -217,7 +217,7 @@ func (t errorTestSeriesSet) Warnings() annotations.Annotations {
 	return nil
 }
 
-// DummyTargetRetriever implements github.com/prometheus/prometheus/web/api/v1.ScrapePoolsRetriever.
+// DummyScrapePoolsRetriever implements github.com/prometheus/prometheus/web/api/v1.ScrapePoolsRetriever.
 type DummyScrapePoolsRetriever struct{}
 
 func (DummyScrapePoolsRetriever) ScrapePools() []string {