fix tests & linter

Signed-off-by: Eugene <eugene@amberpixels.io>

Author: amberpixels

prometheus/promsafe/labels_provider_test.go

@@ -196,8 +196,10 @@ func Test_extractLabelNames(t *testing.T) {
 				Field1: "value1",
 				Field2: 123,
 				Field3: true,
+				Field4: CustomConst1,
+				Field5: CustomConstInt100,
 			},
-			expected: []string{"field1", "field2", "field3"},
+			expected: []string{"field1", "field2", "field3", "field4", "field5"},
 		},
 		{
 			name: "Struct with custom tags and exclusions",

prometheus/promsafe/promauto_adapter/promauto_adapter_test.go

@@ -69,7 +69,7 @@ func ExampleNewCounterVec_promauto_adapted() {
 		Source    string
 	}
 	// if declare Mylabels as global type you can add .ToPrometheusLabels() method
-	// that will use fast labels convertion instead of automatic reflect-based
+	// that will use fast labels conversion instead of automatic reflect-based
 
 	c := promauto.With[MyLabels](myReg).NewCounterVec(counterOpts)