docs: Change heading for the complete example for argocd progressive rollout (#25878)

Signed-off-by: Barisa Obradovic  <[email protected]>
Signed-off-by: Barisa Obradovic <[email protected]>
Signed-off-by: Alex Recuenco <[email protected]>
Co-authored-by: Alex Recuenco <[email protected]>
Co-authored-by: Dan Garfield <[email protected]>

Author: 3 people

docs/operator-manual/applicationset/Progressive-Syncs.md

@@ -155,7 +155,7 @@ In this example, when applications are deleted:
 
 This deletion order is useful for scenarios where you need to tear down dependent services in the correct sequence, such as deleting frontend services before backend dependencies.
 
-#### Example
+### Example
 
 The following example illustrates how to stage a progressive sync over Applications with explicitly configured environment labels.