chore(helm): bump chart version for the new env-var default

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Lm2sCA6iswCvNT33eNRrix

Author: waleedlatif1

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: 1.8.0
+version: 1.8.1
 appVersion: "v0.8.18"
 kubeVersion: ">=1.25.0-0"
 home: https://sim.ai