chore(perf-issues): Add a mention that thresholds can be configured in settings

docs/product/issues/issue-details/performance-issues/index.mdx

@@ -30,7 +30,13 @@ Span evidence is information that explains the performance problem in the contex
 
 The "Event Grouping Information" section provides details of how Sentry fingerprinted the event into the group. You can see which parts of the span evidence contributed to the fingerprint.
 
-## Performance Issue Types
+## Configuration
+
+As a Project Admin, you can also manage individual settings for each performance issue detector in **Project Settings > Performance**. Here, you can raise or lower the thresholds for what Sentry considers a performance issue for each project, or disable detection altogether.
+
+![Performance issue configuration](./img/performance-issue-configuration.png)
+
+## Issue Types
 
 The following is a list of available performance issues:
 
@@ -136,11 +142,9 @@ The following is a list of available performance issues:
   </tbody>
 </table>
 
-## Performance Issue Limitations
+## Limitations
 
 Performance issues currently have the following limitations:
 
-- Performance issues can't be merged or deleted
+- Performance issues cannot be merged
 - Custom fingerprinting and grouping can't be applied to performance issues
-
-We're working on removing some or all of these limitations.