Add missed redirects from #7713 (#7840)

Author: shanamatthews

src/docs/product/performance/retention-priorities/index.mdx

@@ -2,15 +2,18 @@
 title: Retention Priorities
 sidebar_order: 100
 redirect_from:
+  - /product/sentry-basics/metrics/
+  - /product/sentry-basics/sampling/
   - /product/data-management-settings/server-side-sampling/
+  - /product/data-management-settings/server-side-sampling/getting-started/
   - /product/data-management-settings/server-side-sampling/current-limitations/
   - /product/data-management-settings/server-side-sampling/sampling-configurations/
   - /product/data-management-settings/dynamic-sampling/current-limitations/
   - /product/data-management-settings/dynamic-sampling/sampling-configurations/
   - /product/data-management-settings/dynamic-sampling/
   - /product/performance/performance-at-scale/
   - /product/performance/performance-at-scale/getting-started/
-  - /product/performance-at-scale/benefits-performance-at-scale/
+  - /product/performance/performance-at-scale/benefits-performance-at-scale/
 description: "Learn how Sentry determines retention priorities and how to update them."
 ---