[DOCS][7.1]Fixes merge conflict in reporting doc (#53653)

Author: gchaps

docs/user/reporting/watch-example.asciidoc

@@ -48,3 +48,17 @@ report from the Kibana UI.
 {reporting}.
 //For more information, see <<secure-reporting>>.
 //<<reporting-app-users, Setting up a Reporting Role>>.
+
+[NOTE]
+====
+Reporting is integrated with Watcher only as an email attachment type.
+
+The report Generation URL might contain date-math expressions
+that cause the watch to fail with a `parse_exception`.
+Remove curly braces `{`  `}` from date-math expressions and
+URL-encode characters to avoid this.
+For example: `...(range:(%27@timestamp%27:(gte:now-15m%2Fd,lte:now%2Fd))))...`
+
+For more information about configuring watches, see
+{ref}/how-watcher-works.html[How Watcher works].
+====