[Temp] Point to a refresh v3 channel

Author: sinclert-canonical

tests/integration/test_upgrade.py

@@ -47,12 +47,15 @@ async def test_deploy_edge(ops_test: OpsTest, series) -> None:
             config={"profile": "testing"},
             series="jammy",
         ),
-        ops_test.model.deploy(
+        ops_test.juju(
+            "deploy",
             MYSQL_ROUTER_APP_NAME,
-            application_name=MYSQL_ROUTER_APP_NAME,
-            num_units=1,
-            channel="dpe/edge",
-            series=series,
+            "-n",
+            1,
+            "--channel",
+            "dpe/edge/test-refresh-v3",
+            "--series",
+            series,
         ),
         ops_test.model.deploy(
             TEST_APP_NAME,