docs: fix title for the code block (#12991)

* .

* this is better?

* similar changes to other files

* Update documentation/docs/30-advanced/25-errors.md

---------

Co-authored-by: Chew Tee Ming <[email protected]>
Co-authored-by: Tee Ming <[email protected]>

Author: sacrosanctic

documentation/docs/25-build-and-deploy/60-adapter-cloudflare.md

@@ -84,7 +84,7 @@ export async function POST({ request, platform }) {
 
 To include type declarations for your bindings, reference them in your `src/app.d.ts`:
 
-```dts
+```ts
 /// file: src/app.d.ts
 declare global {
 	namespace App {

documentation/docs/25-build-and-deploy/70-adapter-cloudflare-workers.md

@@ -105,7 +105,7 @@ export async function POST({ request, platform }) {
 
 To include type declarations for your bindings, reference them in your `src/app.d.ts`:
 
-```dts
+```ts
 /// file: src/app.d.ts
 declare global {
 	namespace App {

documentation/docs/30-advanced/25-errors.md

@@ -126,7 +126,7 @@ The exception is when the error occurs inside the root `+layout.js` or `+layout.
 
 If you're using TypeScript and need to customize the shape of errors, you can do so by declaring an `App.Error` interface in your app (by convention, in `src/app.d.ts`, though it can live anywhere that TypeScript can 'see'):
 
-```dts
+```ts
 /// file: src/app.d.ts
 declare global {
 	namespace App {