Update dead links (#3577)

Author: HauklandJ

README.md

@@ -12,8 +12,8 @@ apps in Altinn Studio, [check out our documentation](https://docs.altinn.studio/
 ## Getting started
 
 Apps created in Altinn Studio uses the latest stable release of this frontend by default.
-When [testing locally](https://docs.altinn.studio/app/testing/local/), you can also
-[try out](https://docs.altinn.studio/app/testing/local/debug/#using-other-frontend-versions) any of
+When [testing locally](https://docs.altinn.studio/altinn-studio/reference/testing/local/), you can also
+[try out](https://docs.altinn.studio/altinn-studio/reference/testing/local/debug/#using-other-frontend-versions) any of
 our [previous versions or pre-releases](https://github.com/Altinn/app-frontend-react/releases).
 
 Alternatively, you can set up this project locally to test code not yet released,
@@ -67,7 +67,7 @@ To start the app locally:
 
 1. Clone the [App-LocalTest repository](https://github.com/Altinn/app-localtest)
 2. Follow the steps in the [README.md documentation](https://github.com/Altinn/app-localtest/blob/main/README.md)
-3. Follow our documentation on [how to use the local app-frontend](https://docs.altinn.studio/app/testing/local/debug/#using-other-frontend-versions) when running locally
+3. Follow our documentation on [how to use the local app-frontend](https://docs.altinn.studio/altinn-studio/reference/testing/local/debug/#using-other-frontend-versions) when running locally
 
 ## Automated tests