Prometheus: Add tooltip to explain possibility to use patterns in text and title…

Prometheus: Add tooltip to explain possibility to use patterns in text and title fields in annotations (#30825)

* Add tip for using pattern

* Update public/app/plugins/datasource/prometheus/partials/annotations.editor.html

Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>

Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>

public/app/plugins/datasource/prometheus/partials/annotations.editor.html

@@ -10,7 +10,7 @@
 </div>
 
 <div class="gf-form-group">
-	<h5 class="section-heading">Field formats</h5>
+	<h5 class="section-heading">Field formats<tip>For title and text fields, use either the name or a pattern. For example, {{instance}} is replaced with label value for the label instance.</tip></h5>
 	<div class="gf-form-inline">
 		<div class="gf-form">
 			<span class="gf-form-label width-5">Title</span>