docs: fix broken link

docs/docs/@fetch-mock/core/configuration.md

@@ -0,0 +1,52 @@
+---
+sidebar_position: 6
+---
+
+# Configuration
+
+On any `fetch-mock` instance, set configuration options directly on the `fetchMock.config` object. e.g.
+
+```js
+const fetchMock = require('fetch-mock');
+fetchMock.config.sendAsJson = false;
+```
+
+## Available options
+
+Options marked with a `†` can also be overridden for individual calls to `.mock(matcher, response, options)` by setting as properties on the `options` parameter
+
+### sendAsJson<sup>†</sup>
+
+`{Boolean}` default: `true`
+
+Always convert objects passed to `.mock()` to JSON strings before building reponses. Can be useful to set to `false` globally if e.g. dealing with a lot of `ArrayBuffer`s. When `true` the `Content-Type: application/json` header will also be set on each response.
+
+### includeContentLength<sup>†</sup>
+
+`{Boolean}` default: `true`
+
+Sets a `Content-Length` header on each response.
+
+### matchPartialBody
+
+`{Boolean}` default: `false`
+
+Match calls that only partially match a specified body json. Uses the [is-subset](https://www.npmjs.com/package/is-subset) library under the hood, which implements behaviour the same as jest's [.objectContaining()](https://jestjs.io/docs/en/expect#expectobjectcontainingobject) method.
+
+### Custom fetch implementations
+
+`fetch`, `Headers`, `Request`, `Response` can all be set on the configuration object, allowing fetch-mock to mock any implementation of `fetch`, e.g. `node-fetch`. e.g.
+
+```js
+
+import { default as fetch, Headers, Request, Response } from 'node-fetch';
+
+import fetchMock from 'fetch-mock';
+
+fetchMock.config = Object.assign(fetchMock.config, {
+	Request,
+	Response,
+	Headers,
+	fetch,
+});
+```

docs/docs/@fetch-mock/core/route/matcher.md

@@ -126,7 +126,7 @@ When matching a body, this option ignores any properties not mentioned in the ma
 }
 ```
 
-This option can also be [set in the global configuration](/dummy)
+This option can also be [set in the global configuration](/fetch-mock/docs/@fetch-mock/core/configuration)
 
 ## Function matchers