Fix record page context store instance id (#10508)

Fixes bug introduced by https://github.com/twentyhq/twenty/pull/10272
- Replace show page context store instance id by 'main-context-store'

packages/twenty-front/src/modules/command-menu/constants/CommandMenuComponentInstanceId.ts

@@ -0,0 +1 @@
+export const COMMAND_MENU_COMPONENT_INSTANCE_ID = 'command-menu';