Changes to mark 'Data Migration Run' in a explicit heading tag

'Data Migration Run' was only styled to look like headings but wasn’t marked as such, hence added h2 heading tag explicitly.

force-app/main/default/lwc/batchProgress/batchProgress.html

@@ -11,7 +11,7 @@
 
                             <lightning-layout-item size="8">
                                 <div title={title}>
-                                    <span class="slds-truncate"><strong>{title}</strong></span>
+                                    <span class="slds-truncate"><h2><strong>{title}</strong></h2></span>
                                 </div>
                             </lightning-layout-item>