fix: update destroy target to set AZURE_RESOURCE_GROUP before teardown

Author: Pavan-Microsoft

Makefile

@@ -179,7 +179,8 @@ disable-auth-fixed:
 destroy: azd-login ## 🧨 Destroy everything in Azure
 	@if [ -n "$(AZURE_RESOURCE_GROUP)" ]; then \
 		echo "Using resource group: $(AZURE_RESOURCE_GROUP)"; \
-		azd down --force --purge --no-prompt --resource-group $(AZURE_RESOURCE_GROUP); \
+		azd env set AZURE_RESOURCE_GROUP $(AZURE_RESOURCE_GROUP); \
+		azd down --force --purge --no-prompt; \
 	else \
 		echo "AZURE_RESOURCE_GROUP is not set"; \
 		exit 1; \