Fix typo

Co-authored-by: Maryam Saeidi <[email protected]>

docs/en/observability/triage-threshold-breaches.asciidoc

@@ -30,7 +30,7 @@ you can run a log rate analysis, assuming you have the required license.
 Running a log rate analysis is useful for detecting significant dips or spikes in the number of logs.
 Notice that you can adjust the baseline and deviation, and then run the analysis again.
 * The page may also include an alerts history chart that shows the last 30 days.
-This chart is currently only available for rules that specify a singe condition.
+This chart is currently only available for rules that specify a single condition.
 * Timelines on the page are annotated to show when the threshold was breached.
 You can hover over an alert icon to see the timestamp of the alert.