docs: Clarify ignoreBuildErrors behavior (#91367)

Just a complementary note to the TS config reference.

Author: icyJoseph

docs/01-app/03-api-reference/05-config/01-next-config-js/typescript.mdx

@@ -29,6 +29,8 @@ Next.js fails your **production build** (`next build`) when TypeScript errors ar
 
 If you'd like Next.js to dangerously produce production code even when your application has errors, you can disable the built-in type checking step.
 
+Note that this completely skips the TypeScript type checking step. It does not run TypeScript and suppress errors, it bypasses the check entirely.
+
 If disabled, be sure you are running type checks as part of your build or deploy process, otherwise this can be very dangerous.
 
 ```js filename="next.config.js"