chore(web): do not turn ff on by default in sandbox (#6870)

Author: gribnoysup

packages/compass-web/sandbox/index.tsx

@@ -143,7 +143,7 @@ const App = () => {
                 isAtlas && !!enableGenAIFeaturesAtlasOrg,
               optInDataExplorerGenAIFeatures:
                 isAtlas && !!optInDataExplorerGenAIFeatures,
-              enableDataModeling: true,
+              enableDataModeling: false,
             }}
             onTrack={sandboxTelemetry.track}
             onDebug={sandboxLogger.debug}