artifactapi: bump image to v3.11.1 (#358)

## Why
Ships the least_conn selection optimization released in artifactapi v3.11.1 (image built, pushed to the registry, pipeline green).

## How
- Bump api pin: `artifactapi:v3.11.0` → `:v3.11.1` (apps/base/artifactapi/api-deployment.yaml)
- Bump ui pin: `artifactapi-ui:v3.11.0` → `:v3.11.1` (apps/base/artifactapi/ui-deployment.yaml)

`kustomize build apps/overlays/au-syd1/artifactapi` clean; both images resolve to v3.11.1.

Reviewed-on: #358
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

apps/base/artifactapi/api-deployment.yaml

@@ -36,7 +36,7 @@ spec:
               mountPath: /combined-certs
       containers:
         - name: api
-          image: git.unkin.net/unkin/artifactapi:v3.11.0
+          image: git.unkin.net/unkin/artifactapi:v3.11.1
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 8000

apps/base/artifactapi/ui-deployment.yaml

@@ -22,7 +22,7 @@ spec:
       automountServiceAccountToken: true
       containers:
         - name: ui
-          image: git.unkin.net/unkin/artifactapi-ui:v3.11.0
+          image: git.unkin.net/unkin/artifactapi-ui:v3.11.1
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 80