chore(docs): fix broken link to PG EOL

Author: jdpleiness

docs/admin/updates/index.mdx

@@ -119,7 +119,7 @@ If your instance has schema drift or unfinished oob migrations you may need to a
 - [**Sourcegraph AWS AMI instances**](/admin/deploy/machine-images/aws-ami#upgrade)
 
 ## Other helpful links
-- [Postgres 12 End Of Life Notice](admin/postgres12_end_of_life_notice#postgres-12-end-of-life)
+- [Postgres 12 End Of Life Notice](/postgres12_end_of_life_notice#postgres-12-end-of-life)
 - [Migrator operations](/admin/updates/migrator/migrator-operations)
 - [Upgrading Early Versions](/admin/updates/migrator/upgrading-early-versions)
 - [Troubleshooting upgrades](/admin/updates/migrator/troubleshooting-upgrades)