chore(helm): bump chart to 1.3.0 for the enterprise self-host values

values.yaml gained the ENTERPRISE_ENABLED switch and INSTANCE_ORG_* keys, and
the feature-flag envDefaults moved from "false" to empty so the master switch
can resolve them. Additive and backward compatible, so a minor bump.

Author: icecrasher321

helm/sim/Chart.yaml

@@ -2,7 +2,7 @@ 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: 1.2.0
+version: 1.3.0
 appVersion: "v0.7.44"
 kubeVersion: ">=1.25.0-0"
 home: https://sim.ai