Merge ~mthaddon/charm-k8s-ingress/+git/charm-k8s-ingress:metadata-updates into charm-k8s-ingress:master

[Tom Haddon]

Metadata updates for rc8

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 prod-jenkaas-is (prod-jenkaas-is)]

A CI job is currently in progress. A follow up comment will be added when it completes.

[🤖 prod-jenkaas-is (prod-jenkaas-is)]

PASSED: Continuous integration, rev:e1d3b382426bb9739e4b2d9a451e4f5d84ea09bb
https://jenkins.canonical.com/is/job/lp-charm-k8s-ingress-ci/8/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/is/job/lp-charm-test/38/
    None: https://jenkins.canonical.com/is/job/lp-update-mp/51154/

Click here to trigger a rebuild:
https://jenkins.canonical.com/is/job/lp-charm-k8s-ingress-ci/8//rebuild

review: Approve (continuous-integration)

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision b9bba6b0ac64be999e8314e86ef155c3e74a9e71

diff --git a/metadata.yaml b/metadata.yaml
index f1a62fc..bf3d62e 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -11,8 +11,7 @@ bases:
 
 containers:
   placeholder:
-    systems:
-      - resource: placeholder-image
+    resource: placeholder-image
 
 resources:
   placeholder-image: