[VAULT DOCS] Add version tracking redirects (#900)

* add versioned redirect for future versions of high-trafic URLs

* add doc change to trigger rebuild

Author: schavis

content/vault/v1.20.x/content/docs/index.mdx

@@ -6,11 +6,10 @@ description: >-
   common tasks, and best practices.
 ---
 
-# Documentation
+# Vault product documentation
 
-Welcome to the Vault product documentation!
+<Note>
 
-If you are getting started with Vault, we recommend reading the
-[What is Vault](/vault/docs/what-is-vault) docs before diving into our
-[Vault Foundations tutorial set](/vault/tutorials/getting-started)
-or our [Vault operator quickstart guide](/vault/docs/get-started/operations-qs).
+You are currently viewing documentation for an older version of Vault.
+
+</Note>

content/vault/v1.20.x/redirects.jsonc

@@ -396,6 +396,19 @@
     "permanent": true
   },
 
+  /**
+    Version-tracking redirects for defunct path: /platform/k8s/*:
+
+    - Source: {version}/platform/k8s/*
+      Target: {version}/deploy/kybernetes/*
+      Range:  1.19.x onward
+  **/
+  {
+    "source": "/vault/docs/v:version(1\\.(?:19|2[0-9])\\.x)/platform/k8s/:slug*",
+    "destination": "/vault/docs/v:version/deploy/kubernetes/:slug*",
+    "permanent": true
+  },
+
   /*****************************************************************************
     2025 | IA update - Leasing redirects
    *****************************************************************************/