[all hosts] (Troubleshooting) Add TypeScript version number (#807)

* [all hosts] (Troubleshooting) Add TypeScript version number

* Update docs/develop/typescript-restrictions.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: alison-mk

docs/develop/typescript-restrictions.md

@@ -1,14 +1,17 @@
 ---
 title: TypeScript restrictions in Office Scripts
 description: The specifics of the TypeScript compiler and linter used by the Office Scripts Code Editor.
-ms.date: 10/01/2022
+ms.date: 11/21/2025
 ms.localizationpriority: medium
 ---
 
 # TypeScript restrictions in Office Scripts
 
 Office Scripts use the TypeScript language. For the most part, any TypeScript or JavaScript code will work in Office Scripts. However, there are a few restrictions enforced by the Code Editor to ensure your script works consistently and as intended with your Excel workbook.
 
+> [!NOTE]
+> Office Scripts uses TypeScript version 4.0.3. TypeScript features added in subsequent versions are not supported in Office Scripts.
+
 ## No 'any' type in Office Scripts
 
 Writing [types](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html) is optional in TypeScript, because the types can be inferred. However, Office Scripts requires that a variable can't be of [type any](https://www.typescriptlang.org/docs/handbook/basic-types.html#any). Both explicit and implicit `any` are not allowed in Office Scripts. These cases are reported as errors.