Use secondary color for timings (#849)

Author: timja

src/main/frontend/pipeline-graph-view/pipeline-graph/main/support/labels.tsx

@@ -95,6 +95,7 @@ export function TimingsLabel({
     maxHeight: labelHeight + "px",
     textAlign: "center",
     marginLeft: labelOffsetH,
+    color: "var(--text-color-secondary)",
   };
 
   const x = details.x;