feat: update placeholder

Author: talissoncosta

frontend/web/components/segments/Rule/components/RuleConditionValueInput.tsx

@@ -63,6 +63,7 @@ const RuleConditionValueInput: React.FC<RuleConditionValueInputProps> = ({
           onSelectionChange={(selectedValues: string[]) => {
             onChange?.(JSON.stringify(selectedValues))
           }}
+          placeholder='Select environments...'
           options={environmentOptions}
           className='w-100'
         />