v6: tsconfig template update

src/content/docs/en/guides/upgrade-to/v6.mdx

@@ -1690,6 +1690,23 @@ function myLoader() {
 
 <ReadMore>Learn more about [defining loader schema types](/en/reference/content-loader-reference/#the-loader-object).</ReadMore>
 
+### Changed: TypeScript configuration
+
+<SourcePR number="15668" title="feat: typescript 6" />
+
+In Astro 5.x, TSConfig templates did not set `compilerOptions.types` and `compilerOptions.libReplacement`.
+
+Astro 6.0 TSConfig templates now set `compilerOptions.types` to `["node"]` and `compilerOptions.libReplacement` to `false` to improve performance and compatibility with the [upcoming TypeScript 6.0](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0-beta) release.
+
+#### What should I do?
+
+If you face any TypeScript error when upgrading, follow TypeScript's guide:
+
+- [`types` now defaults to `[]`](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0-beta/#types-now-defaults-to-[])
+- [Simple Default Changes](https://devblogs.microsoft.com/typescript/announcing-typescript-6-0-beta/#simple-default-changes)
+
+<ReadMore>Read more about [TypeScript configuration in Astro](/en/guides/typescript/#setup).</ReadMore>
+
 {/* 
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