change jvm.threads.count to jvm.thread.count to match semconv.

Author: breedx-splk

jmx-scraper/src/integrationTest/java/io/opentelemetry/contrib/jmxscraper/target_systems/JvmIntegrationTest.java

@@ -170,7 +170,7 @@ protected MetricsVerifier createMetricsVerifier() {
                     .isGauge()
                     .hasDataPointsWithAttributes(memoryAttributes))
         .add(
-            "jvm.threads.count",
+            "jvm.thread.count",
             metric ->
                 metric
                     .hasDescription("number of threads")

jmx-scraper/src/main/resources/jvm.yaml

@@ -86,6 +86,6 @@ rules:
   - bean: java.lang:type=Threading
     mapping:
       ThreadCount:
-        metric: jvm.threads.count
+        metric: jvm.thread.count
         unit: "{thread}"
         desc: number of threads