staging: Rename add-forge-now workers

Refs. swh/infra/sysadm-environment#4881

swh/values/production.yaml

@@ -34,7 +34,7 @@ loaders:
   amqp:
     host: rabbitmq.internal.softwareheritage.org
   deployments:
-    addforgenow:
+    add-forge-now:
       image: swh_loader_git_image
       requestedMemory: 1024Mi
       requestedCpu: 500m

swh/values/staging.yaml

@@ -10,7 +10,7 @@ loaders:
     host: scheduler0.internal.staging.swh.network
     port: 5672
   deployments:
-    addforgenow:
+    add-forge-now:
       image: swh_loader_git_image
       requestedMemory: 256Mi
       requestedCpu: 200m