message: Fix source links
diff: @@ -21,7 +21,7 @@ yarn add @backstage/plugin-cost-insights
  1. Configure `app-config.yaml`. See [Configuration](#configuration).
  -2. Create a CostInsights client. Clients must implement the CostInsightsApi interface. See the [API file](https://github.com/spotify/backstage/plugins/cost-insights/src/api/CostInsightsApi.ts) for required methods and documentation.
  +2. Create a CostInsights client. Clients must implement the CostInsightsApi interface. See the [API file](https://github.com/spotify/backstage/blob/master/plugins/cost-insights/src/api/CostInsightsApi.ts) for required methods and documentation.
  ```ts
  // path/to/CostInsightsClient.ts
  @@ -58,7 +58,7 @@ export { plugin as CostInsights } from '@backstage/plugin-cost-insights';
  Cost Insights has only two required configuration fields: a map of cloud `products` for showing cost breakdowns and `engineerCost` - the average yearly cost of an engineer including benefits. Products must be defined as keys on the `products` field.
  -You can optionally supply a product `icon` to display in Cost Insights navigation. See the [type file](https://github.com/spotify/backstage/plugins/cost-insights/types/Icon.ts) for supported types and Material UI icon [mappings](https://github.com/spotify/backstage/plugins/cost-insights/utils/navigation.ts).
  +You can optionally supply a product `icon` to display in Cost Insights navigation. See the [type file](https://github.com/spotify/backstage/blob/master/plugins/cost-insights/src/types/Icon.ts) for supported types and Material UI icon [mappings](https://github.com/spotify/backstage/blob/master/plugins/cost-insights/src/utils/navigation.tsx).
  **Note:** Product keys should be unique and camelCased. Backstage does not support underscores in configuration keys.
  