fix: clarify description for enableScalability input in deploy-v2.yml

Author: Vamshi-Microsoft

.github/workflows/deploy-v2.yml

@@ -67,7 +67,7 @@ on:
         type: boolean
 
       enableScalability:
-        description: 'Enable Scalability'
+        description: 'Enable Scalability (WAF only)'
         required: false
         default: false
         type: boolean