use an old revision to avoid false-positives

Author: Thanhphan1147

tests/integration/bundle/bundle-with-charm-revision.yaml

@@ -2,6 +2,6 @@ applications:
   hello-juju:
     charm: "hello-juju"
     channel: latest/stable
-    revision: 8
+    revision: 7
     num_units: 1
     series: focal

tests/integration/test_model.py

@@ -189,7 +189,7 @@ async def test_deploy_bundle_with_pinned_charm_revision():
     bundle_yaml_path = bundle_dir / 'bundle-with-charm-revision.yaml'
     # Revision of the hello-juju charm defined in the bundle yaml
     # We can also read the yaml to get the revision but we are hard-coding it for now for simplicity
-    pinned_revision = 8
+    pinned_revision = 7
 
     async with base.CleanModel() as model:
         await model.deploy(str(bundle_yaml_path))