Add upgrade-agentic-workflows.md to deletion list

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

pkg/cli/copilot-agents.go

@@ -308,6 +308,7 @@ func deleteOldAgentFiles(verbose bool) error {
 		"create-agentic-workflow.md",
 		"setup-agentic-workflows.md",
 		"update-agentic-workflows.md",
+		"upgrade-agentic-workflows.md",
 	}
 
 	// Also delete the dangling singular form file from .github/aw/

pkg/cli/copilot_agents_test.go

@@ -255,11 +255,13 @@ func TestDeleteOldAgentFiles(t *testing.T) {
 				".github/agents/create-agentic-workflow.md",
 				".github/agents/setup-agentic-workflows.md",
 				".github/agents/update-agentic-workflows.md",
+				".github/agents/upgrade-agentic-workflows.md",
 			},
 			expectedDeleted: []string{
 				".github/agents/create-agentic-workflow.md",
 				".github/agents/setup-agentic-workflows.md",
 				".github/agents/update-agentic-workflows.md",
+				".github/agents/upgrade-agentic-workflows.md",
 			},
 		},
 		{
@@ -271,6 +273,7 @@ func TestDeleteOldAgentFiles(t *testing.T) {
 				".github/agents/create-agentic-workflow.md",
 				".github/agents/setup-agentic-workflows.md",
 				".github/agents/update-agentic-workflows.md",
+				".github/agents/upgrade-agentic-workflows.md",
 				".github/aw/upgrade-agentic-workflow.md",
 			},
 			expectedDeleted: []string{
@@ -280,6 +283,7 @@ func TestDeleteOldAgentFiles(t *testing.T) {
 				".github/agents/create-agentic-workflow.md",
 				".github/agents/setup-agentic-workflows.md",
 				".github/agents/update-agentic-workflows.md",
+				".github/agents/upgrade-agentic-workflows.md",
 				".github/aw/upgrade-agentic-workflow.md",
 			},
 		},