refactor: rename chart to charts [ci skip]

it is common practice to name the folder charts even though there is only one helm chart

deploy/chart/wsj-standup/values.yaml

@@ -1,28 +0,0 @@
-image:
-  repository: registry.mareshq.com/skaut/wsj/standup-discord-notification
-  pullPolicy: IfNotPresent
-  # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
-  pullSecretBase64: null
-
-nameOverride: ""
-fullnameOverride: ""
-
-serviceAccount:
-  create: true
-  annotations: {}
-  # If not set and create is true, a name is generated using the fullname template
-  name: ""
-
-resources:
-  limits:
-    cpu: 100m
-    memory: 256Mi
-  requests:
-    cpu: 50m
-    memory: 128Mi
-
-app:
-  WEBHOOK_URL: null
-  SENTRY_DSN: null
-  NODE_ENV: prod