Fix links in migration instructions

Author: csantero

README.md

@@ -31,7 +31,7 @@ In general, most upgrades won't require any migration steps to work, but if you
 
 ### From `<2.16.0` to `>=2.16.0`
 
-Since `2.16.0`, the template uses different `tsconfig` files for both development and production mode. For the latter, unfortunately, the path resolver is not smart enough to fall back to the basic `tsconfig.json` in case the expected `tsconfig.prod.json` is not present, so you have to create this file manually like shown [here](https://github.com/wmonk/create-react-app-typescript/blob/master/packages/react-scripts/template/tsconfig.prod.json).
+Since `2.16.0`, the template uses different `tsconfig` files for both development and production mode. For the latter, unfortunately, the path resolver is not smart enough to fall back to the basic `tsconfig.json` in case the expected `tsconfig.prod.json` is not present, so you have to create this file manually like shown [here](https://github.com/wmonk/create-react-app-typescript/blob/master/template/tsconfig.prod.json).
 
 ### From `<2.13.0` to `>=2.13.0`
 
@@ -61,7 +61,7 @@ Test suite failed to run
 }
 ```
 
-To fix this, create a new file *in the root of the project* called `tsconfig.test.json`, and paste [the content of this file into it](https://raw.githubusercontent.com/wmonk/create-react-app-typescript/master/packages/react-scripts/template/tsconfig.test.json). Everything should work now. For more info, please see [this issue](https://github.com/wmonk/create-react-app-typescript/issues/141).
+To fix this, create a new file *in the root of the project* called `tsconfig.test.json`, and paste [the content of this file into it](https://raw.githubusercontent.com/wmonk/create-react-app-typescript/master/template/tsconfig.test.json). Everything should work now. For more info, please see [this issue](https://github.com/wmonk/create-react-app-typescript/issues/141).
 
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