Fix Typescript bug

Author: thecrypticace

packages/tailwindcss-language-server/src/language/languageModelCache.ts

@@ -21,7 +21,7 @@ export function getLanguageModelCache<T>(
   } = {}
   let nModels = 0
 
-  let cleanupInterval: NodeJS.Timer | undefined = undefined
+  let cleanupInterval: NodeJS.Timeout | undefined = undefined
   if (cleanupIntervalTimeInSec > 0) {
     cleanupInterval = setInterval(() => {
       let cutoffTime = Date.now() - cleanupIntervalTimeInSec * 1000