Update links in docs

Author: slowcheetah

docs/web/docs/engines.md

@@ -4,6 +4,6 @@
 
 However, I have no possibility to test `core-js` absolutely everywhere - for example, testing in IE7- and some other ancient was stopped. The list of definitely supported engines you can see in the compatibility table by the link below. [Write](https://github.com/zloirock/core-js/issues) if you have issues or questions with the support of any engine.
 
-`core-js` project provides (as [`core-js-compat`](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) package) all required data about the necessity of `core-js` modules, entry points, and tools for work with it - it's useful for integration with tools like `babel` or `swc`. If you wanna help, you could take a look at the related section of [`CONTRIBUTING`](/contributing#how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](https://zloirock.github.io/core-js/master/compat/), the example:
+`core-js` project provides (as [`core-js-compat`](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) package) all required data about the necessity of `core-js` modules, entry points, and tools for work with it - it's useful for integration with tools like `babel` or `swc`. If you wanna help, you could take a look at the related section of [`CONTRIBUTING`](contributing#h-how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](https://zloirock.github.io/core-js/master/compat/), the example:
 
 ![compat-table](https://user-images.githubusercontent.com/2213682/217452234-ccdcfc5a-c7d3-40d1-ab3f-86902315b8c3.png)

docs/web/docs/usage.md

@@ -227,7 +227,7 @@ It does not work with some features. Also, if you change the default behavior, e
 
 ## Custom build
 
-For some cases could be useful to exclude some `core-js` features or generate a polyfill for target engines. You could use [`core-js-builder`](/packages/core-js-builder) package for that.
+For some cases could be useful to exclude some `core-js` features or generate a polyfill for target engines. You could use [`core-js-builder`](https://github.com/zloirock/core-js/tree/master/packages/core-js-builder) package for that.
 
 ## `postinstall` message
 The `core-js` project needs your help, so the package shows a message about it after installation. If it causes problems for you, you can disable it: