fix redeclaration of variable in formula calculation

Author: utkuturunc

packages/react-notion-x/src/third-party/property.tsx

@@ -10,6 +10,7 @@ import { Text } from '../components/text'
 import { PageTitle } from '../components/page-title'
 import { GracefulImage } from '../components/graceful-image'
 import { evalFormula } from './eval-formula'
+import { FormulaResult } from 'notion-types'
 
 export interface IPropertyProps {
   propertyId?: string
@@ -76,10 +77,10 @@ export const PropertyImpl: React.FC<IPropertyProps> = (props) => {
   const renderFormulaValue = React.useMemo(
     () =>
       function FormulaProperty() {
-        let content: string
+        let content: FormulaResult | null
 
         try {
-          let content = evalFormula(schema.formula, {
+          content = evalFormula(schema.formula, {
             schema: collection?.schema,
             properties: block?.properties
           })