docs: add manual redirection page for az key vault auth (#266)

Author: stijnmoreels

docs/Gemfile

@@ -1,4 +1,4 @@
 source 'https://rubygems.org'
 gem 'github-pages', '>= 207', group: :jekyll_plugins
 gem 'nokogiri', '>= 1.11.4'
-gem 'jekyll-redirect-from', '>= 0.15.0', group: :jekyll_plugins
+gem 'jekyll-redirect-from', '>= 0.15.0', group: :jekyll_plugins

docs/features/auth/azure-key-vault.md

@@ -1,4 +1,10 @@
 ---
+title: "Authentication with Azure Key Vault"
 layout: default
-redirect_to: /features/secret-store/provider/key-vault
----
+---
+
+# Authentication with Azure Key Vault
+
+The authentication mechanisms page is moved towards an [dedicated page](./../secret-store/provider/key-vault) that explains how the Azure Key Vault can be added as a secret provider to the secret store.
+
+More information in the secret store can be found [here](./../secet-store/).

docs/preview/features/auth/azure-key-vault.md

@@ -0,0 +1,10 @@
+---
+title: "Authentication with Azure Key Vault"
+layout: default
+---
+
+# Authentication with Azure Key Vault
+
+The authentication mechanisms page is moved towards an [dedicated page](./../secret-store/provider/key-vault) that explains how the Azure Key Vault can be added as a secret provider to the secret store.
+
+More information in the secret store can be found [here](./../secet-store/).