fix(helm): bump chart appVersion to the release it ships with

appVersion has been pinned at v0.7.44 since chart 1.2.0 while the app moved
through forty-odd releases. It is the default tag for every first-party image
(app, realtime, migrations, pii, copilot), so a helm install that does not pin
image.tag deploys an application far behind the chart shipping with it — and
any values key added by a newer chart is silently inert, because the running
image has no code that reads it.

The release tag is published by the main-branch merge commit that cuts it, so
this lands on main together with v0.8.18.

Author: waleedlatif1

helm/sim/Chart.yaml

@@ -2,8 +2,8 @@ apiVersion: v2
 name: sim
 description: A Helm chart for Sim - the open-source AI workspace where teams build, deploy, and manage AI agents
 type: application
-version: 1.6.3
-appVersion: "v0.7.44"
+version: 1.6.4
+appVersion: "v0.8.18"
 kubeVersion: ">=1.25.0-0"
 home: https://sim.ai
 icon: https://raw.githubusercontent.com/simstudioai/sim/main/apps/sim/public/logo/primary/primary.svg

helm/sim/README.md

@@ -515,6 +515,10 @@ kubectl --namespace sim logs deploy/sim-app -c migrations
 
 ---
 
+## Upgrading to 1.6.4
+
+* `appVersion` — the default image tag for every first-party image (`app`, `realtime`, `migrations`, `pii`, `copilot`) when `image.tag` is unset — moves from `v0.7.44` to `v0.8.18`. It had not been bumped since chart 1.2.0, so an unpinned install deployed an application dozens of releases behind the chart it shipped with, and values keys added by newer charts had no effect because the running image did not read them. **An unpinned release rolls every first-party pod on upgrade.** Installs that pin `image.tag` or `image.digest` are unaffected; pinning explicitly remains the recommendation for production.
+
 ## Upgrading to 1.5.0
 
 Two changes alter behavior on an existing release. Neither requires action, but read both.

helm/sim/values.yaml

@@ -20,7 +20,7 @@ app:
   # Image configuration
   image:
     repository: simstudioai/simstudio
-    # tag defaults to Chart.AppVersion. Override with a release tag (e.g. "v0.7.44") or pin via image.digest.
+    # tag defaults to Chart.AppVersion. Override with a release tag (e.g. "v0.8.18") or pin via image.digest.
     tag: ""
     # Optional image digest pin: "sha256:..." — when set, overrides tag.
     digest: ""