fix: fixed a few links

Author: ovflowd

pages/en/docs/guides/simple-profiling.md

@@ -287,4 +287,4 @@ You may also find [how to create a flame graph][diagnostics flamegraph] helpful.
 
 [profiler inside V8]: https://v8.dev/docs/profile
 [benefits of asynchronous programming]: https://nodesource.com/blog/why-asynchronous
-[diagnostics flamegraph]: /en/docs/guides/diagnostics-flamegraph/
+[diagnostics flamegraph]: /docs/guides/diagnostics-flamegraph/

pages/en/learn/asynchronous-work/overview-of-blocking-vs-non-blocking.md

@@ -9,7 +9,7 @@ authors: ovflowd, HassanBahati
 This overview covers the difference between **blocking** and **non-blocking**
 calls in Node.js. This overview will refer to the event loop and libuv but no
 prior knowledge of those topics is required. Readers are assumed to have a
-basic understanding of the JavaScript language and Node.js [callback pattern](/learn/javascript-asynchronous-programming-and-callbacks/).
+basic understanding of the JavaScript language and Node.js [callback pattern](/learn/asynchronous-work/javascript-asynchronous-programming-and-callbacks).
 
 > "I/O" refers primarily to interaction with the system's disk and
 > network supported by [libuv](https://libuv.org/).

pages/en/learn/getting-started/how-much-javascript-do-you-need-to-know-to-use-nodejs.md

@@ -23,7 +23,7 @@ As a beginner, it's hard to get to a point where you are confident enough in you
 - [Arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)
 - [Template Literals](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals)
 - [Strict Mode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode)
-- [ECMAScript 2015 (ES6) and beyond](/learn/ecmascript-2015-es6-and-beyond/)
+- [ECMAScript 2015 (ES6) and beyond](/learn/getting-started/ecmascript-2015-es6-and-beyond)
 
 With those concepts in mind, you are well on your road to become a proficient JavaScript developer, in both the browser and in Node.js.