fix typo (#14339)

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Fixes a typo 🐶

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Author: macbookandrew

docs/product/sentry-basics/performance-monitoring.mdx

@@ -59,7 +59,7 @@ This demo shows a [new version](/product/explore/new-trace-explorer/) of the Tra
 
 ### 4: Metrics, Alerts, and Dashboards: Build custom views of performance data
 
-By default, Sentry automatically tracks a set of [performance metrics](/platforms/javascript/tracing/span-metrics/) for every trace. These are used to pupulate the Insights dashboards, but you can also use them to build custom [dashboards](/product/dashboards/) and [alerts](/product/alerts/).
+By default, Sentry automatically tracks a set of [performance metrics](/platforms/javascript/tracing/span-metrics/) for every trace. These are used to populate the Insights dashboards, but you can also use them to build custom [dashboards](/product/dashboards/) and [alerts](/product/alerts/).
 
 Opting into the [Early Adopter](https://sentry.io/orgredirect/settings/:orgslug/) program for the Trace Explorer also gives you access to the new [Span Metrics](/product/explore/new-trace-explorer/#span-metrics/) feature, which lets you calculate custom metrics based on your span data. This is extremely useful for building dashboards and alerts that are underpinned by real performance tracing data, so you can quickly debug performance issues.