fix(connectors): restore Linear connector requiredScopes

Linear OAuth does return scopes in the token response. The previous
fix of emptying requiredScopes was based on an incorrect assumption.
Restoring requiredScopes: ['read'] as it should work correctly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/sim/connectors/linear/linear.ts

@@ -193,7 +193,7 @@ export const linearConnector: ConnectorConfig = {
   oauth: {
     required: true,
     provider: 'linear',
-    requiredScopes: [],
+    requiredScopes: ['read'],
   },
 
   configFields: [