Update logs-threshold-alert.asciidoc (#3799)

docs/en/observability/logs-threshold-alert.asciidoc

@@ -21,7 +21,7 @@ The comparators available for conditions depend on the chosen field. The combina
 * Aggregatable fields: *is* or *is not*.
 * Non-aggregatable fields: *matches*, *does not match*, *matches phrase*, *does not match phrase*.
 ** *Matches* queries some or all of the contents of your entered value regardless of order. For example, `WITH message MATCHES your example message` looks for messages containing the words `your` and `example` and `message` and returns results with some or all of those words.
-** *Matches phrase* queries the exact contents of your entered value. For example, `WITH message MATCHES your example message` looks for the phrase `your example message` and returns results with that exact phrase.
+** *Matches phrase* queries the exact contents of your entered value. For example, `WITH message MATCHES PHRASE your example message` looks for the phrase `your example message` and returns results with that exact phrase.
 
 There are several key supported use cases. You can create rules based on fields containing or matching a text pattern,
 rules based on a numeric field and arithmetic operator, or a single rule with multiple conditions.