Fix missing quote

Author: IanCal

packages/runtime-common/matrix-constants.ts

@@ -16,7 +16,7 @@ export const APP_BOXEL_ACTIVE_LLM = 'app.boxel.active-llm';
 export const DEFAULT_LLM = 'openai/gpt-4o';
 export const DEFAULT_LLM_LIST = [
   'anthropic/claude-3.5-sonnet',
-  'anthropic/claude-3.7-sonnet,
+  'anthropic/claude-3.7-sonnet',
   'google/gemini-pro-1.5',
   'openai/gpt-4o',
   'openai/gpt-4o-mini',