Fix typo in documentation (#204814)

Fix typo introduced in #204179 (review)

dev_docs/tutorials/performance/adding_custom_performance_metrics.mdx

@@ -298,7 +298,7 @@ This event will be indexed with the following structure:
 
 The meta field supports telemetry on time ranges, providing calculated metrics for enhanced context. This includes:
 
-- **Query range in ceconds:**
+- **Query range in seconds:**
 
   - Calculated as the time difference in seconds between `rangeFrom` and `rangeTo`.