fix: Guide message contains undefined in admins room

Author: nkdengineer

src/CONST.ts

@@ -5525,7 +5525,7 @@ const CONST = {
         [onboardingChoices.EMPLOYER]: onboardingEmployerOrSubmitMessage,
         [onboardingChoices.SUBMIT]: onboardingEmployerOrSubmitMessage,
         [onboardingChoices.MANAGE_TEAM]: {
-            message: ({onboardingCompanySize: companySize}) => `Here is a task list I’d recommend for a company of your size with ${companySize} submitters:`,
+            message: ({onboardingCompanySize: companySize}) => `Here is a task list I’d recommend for a company of your size${companySize ? ` with ${companySize} submitters` : ':'}`,
             tasks: [
                 createWorkspaceTask,
                 testDriveAdminTask,