README: update build from source link

Release note: None

Author: dhartunian

README.md

@@ -47,7 +47,7 @@ See our online documentation: [Quickstart with CockroachCloud](https://www.cockr
 
 ## Starting with CockroachDB
 
-1. Install CockroachDB:  [using a pre-built executable](https://www.cockroachlabs.com/docs/stable/install-cockroachdb.html) or [build it from source](https://www.cockroachlabs.com/docs/v21.1/install-cockroachdb-linux#build-from-source).
+1. Install CockroachDB:  [using a pre-built executable](https://www.cockroachlabs.com/docs/stable/install-cockroachdb.html) or [build it from source](https://cockroachlabs.atlassian.net/wiki/spaces/CRDB/pages/181338446/Getting+and+building+CockroachDB+from+source).
 2. [Start a local cluster](https://www.cockroachlabs.com/docs/stable/start-a-local-cluster.html) and connect to it via the [built-in SQL client](https://www.cockroachlabs.com/docs/stable/use-the-built-in-sql-client.html).
 3. [Learn more about CockroachDB SQL](https://www.cockroachlabs.com/docs/stable/learn-cockroachdb-sql.html).
 4. Use a PostgreSQL-compatible driver or ORM to [build an app with CockroachDB](https://www.cockroachlabs.com/docs/stable/hello-world-example-apps.html).