Fix migration docs links (#11562)

docs/migration/v3-migration.md

@@ -17,10 +17,10 @@ Chart.js 3.0 introduces a number of breaking changes. Chart.js 2.0 was released
 ### Setup and installation
 
 * Distributed files are now in lower case. For example: `dist/chart.js`.
-* Chart.js is no longer providing the `Chart.bundle.js` and `Chart.bundle.min.js`. Please see the [installation](installation.md) and [integration](integration.md) docs for details on the recommended way to setup Chart.js if you were using these builds.
+* Chart.js is no longer providing the `Chart.bundle.js` and `Chart.bundle.min.js`. Please see the [installation](../getting-started/installation.md) and [integration](../getting-started/integration.md) docs for details on the recommended way to setup Chart.js if you were using these builds.
 * `moment` is no longer specified as an npm dependency. If you are using the `time` or `timeseries` scales, you must include one of [the available adapters](https://github.com/chartjs/awesome#adapters) and corresponding date library. You no longer need to exclude moment from your build.
 * The `Chart` constructor will throw an error if the canvas/context provided is already in use
-* Chart.js 3 is tree-shakeable. So if you are using it as an `npm` module in a project and want to make use of this feature, you need to import and register the controllers, elements, scales and plugins you want to use, for a list of all the available items to import see [integration](integration.md#bundlers-webpack-rollup-etc). You will not have to call `register` if importing Chart.js via a `script` tag or from the [`auto`](integration.md#bundlers-webpack-rollup-etc) register path as an `npm` module, in this case you will not get the tree shaking benefits. Here is an example of registering components:
+* Chart.js 3 is tree-shakeable. So if you are using it as an `npm` module in a project and want to make use of this feature, you need to import and register the controllers, elements, scales and plugins you want to use, for a list of all the available items to import see [integration](../getting-started/integration.md#bundlers-webpack-rollup-etc). You will not have to call `register` if importing Chart.js via a `script` tag or from the [`auto`](../getting-started/integration.md#bundlers-webpack-rollup-etc) register path as an `npm` module, in this case you will not get the tree shaking benefits. Here is an example of registering components:
 
 ```javascript
 import { Chart, LineController, LineElement, PointElement, LinearScale, Title } from `chart.js`