chore(artifactapi): deploy v3.7.4

Bumps the API and UI images from v3.7.3 to v3.7.4 so au-syd1 picks up the
terraform provider registry: local terraform repos now serve
/.well-known/terraform.json and the providers.v1 endpoints, and the signing
key self-provisions in the database (no secret to mount).

- api-deployment: artifactapi v3.7.3 -> v3.7.4
- ui-deployment: artifactapi-ui v3.7.3 -> v3.7.4

apps/base/artifactapi/api-deployment.yaml

@@ -35,7 +35,7 @@ spec:
               mountPath: /combined-certs
       containers:
         - name: api
-          image: git.unkin.net/unkin/artifactapi:v3.7.3
+          image: git.unkin.net/unkin/artifactapi:v3.7.4
           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:v3.7.3
+          image: git.unkin.net/unkin/artifactapi-ui:v3.7.4
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 80