Fix "override default versions" links (#21544)

* Fix "override default versions" links

* Update build-image.mdx

Author: flotwig

src/content/docs/pages/configuration/build-image.mdx

@@ -12,11 +12,11 @@ import {
 
 Cloudflare Pages' build environment has broad support for a variety of languages, such as Ruby, Node.js, Python, PHP, and Go.
 
-If you need to use a [specific version](/pages/configuration/build-image/#overriding-default-versions) of a language, (for example, Node.js or Ruby) you can specify it by providing an associated environment variable in your build configuration, or setting the relevant file in your source code.
+If you need to use a [specific version](#override-default-versions) of a language, (for example, Node.js or Ruby) you can specify it by providing an associated environment variable in your build configuration, or setting the relevant file in your source code.
 
 ## Supported languages and tools
 
-In the following tables, review the preinstalled versions for languages and tools included in the Cloudflare Pages' build image, and the environment variables and/or files available for [overriding the preinstalled version](/pages/configuration/build-image/#overriding-default-versions):
+In the following tables, review the preinstalled versions for languages and tools included in the Cloudflare Pages' build image, and the environment variables and/or files available for [overriding the preinstalled version](#override-default-versions):
 
 ### Languages and runtime