fix: Link to Node.js equivalent in Deno runtime metrics docs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: chargome

docs/platforms/javascript/common/configuration/integrations/denoruntimemetrics.mdx

@@ -37,7 +37,7 @@ The following metrics are emitted every 30 seconds by default:
 
 <Alert>
 
-Unlike the Node.js equivalent, CPU and event loop metrics are not available because Deno does not expose `process.cpuUsage()`, `performance.eventLoopUtilization()`, or `monitorEventLoopDelay`.
+Unlike the [Node.js equivalent](./noderuntimemetrics), CPU and event loop metrics are not available because Deno does not expose `process.cpuUsage()`, `performance.eventLoopUtilization()`, or `monitorEventLoopDelay`.
 
 </Alert>