Fix PrometheusHandler describe text

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/main/__test__/prometheus-handler.test.ts

@@ -43,7 +43,7 @@ const createTestPrometheusProvider = (kind: string, alwaysFail: ServiceResult):
   },
 });
 
-describe("ContextHandler", () => {
+describe("PrometheusHandler", () => {
   let di: DiContainer;
   let cluster: Cluster;