docs: fix incorrect tag

Closes #2032
Closes #2028

docs/versioned_docs/version-v0.8/quickstart.mdx

@@ -126,7 +126,7 @@ Let's clone Ory Kratos and run `docker-compose`:
 ```shell script
 git clone https://github.com/ory/kratos.git
 cd kratos
-git checkout v0.8.0-alpha.4.pre.0
+git checkout v0.8.0-alpha.3
 
 docker-compose -f quickstart.yml -f quickstart-standalone.yml up --build --force-recreate
 # If you have SELinux, run:
@@ -559,23 +559,23 @@ recovery, head over to the
 #### Configuration
 
 You can find all configuration files used for this quickstart guide in
-[`./contrib/quickstart/kratos`](https://github.com/ory/kratos/tree/v0.8.0-alpha.4.pre.0/contrib/quickstart/kratos/email-password)
+[`./contrib/quickstart/kratos`](https://github.com/ory/kratos/tree/v0.8.0-alpha.3/contrib/quickstart/kratos/email-password)
 ,
-[`./quickstart.yml`](https://github.com/ory/kratos/blob/v0.8.0-alpha.4.pre.0/quickstart.yml),
+[`./quickstart.yml`](https://github.com/ory/kratos/blob/v0.8.0-alpha.3/quickstart.yml),
 and
-[`./quickstart-standalone.yml`](https://github.com/ory/kratos/blob/v0.8.0-alpha.4.pre.0/quickstart-standalone.yml).
+[`./quickstart-standalone.yml`](https://github.com/ory/kratos/blob/v0.8.0-alpha.3/quickstart-standalone.yml).
 To understand what each of those configuration files does, consult the other
 chapters of this documentation.
 
 :::note
 
 To get a minimal version of Ory Kratos running, you need to set configuration
 values for
-[`identity.default_schema_url`](https://github.com/ory/kratos/blob/v0.8.0-alpha.4.pre.0/contrib/quickstart/kratos/email-password/kratos.yml#L75)
+[`identity.default_schema_url`](https://github.com/ory/kratos/blob/v0.8.0-alpha.3/contrib/quickstart/kratos/email-password/kratos.yml#L75)
 and
-[`DSN`](https://github.com/ory/kratos/blob/v0.8.0-alpha.4.pre.0/quickstart.yml#L42).
+[`DSN`](https://github.com/ory/kratos/blob/v0.8.0-alpha.3/quickstart.yml#L42).
 You should also configure
-[`selfservice.flows.*.ui_url`](https://github.com/ory/kratos/blob/v0.8.0-alpha.4.pre.0/contrib/quickstart/kratos/email-password/kratos.yml#L24)
+[`selfservice.flows.*.ui_url`](https://github.com/ory/kratos/blob/v0.8.0-alpha.3/contrib/quickstart/kratos/email-password/kratos.yml#L24)
 or else Kratos will use fallback URLs.
 
 :::