docs: fix harbor site not being included

docs/integrations/services/rancher/index.md

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+# Rancher Integration
+
+## What is Rancher
+
+From https://rancher.com/products/rancher
+
+```
+An Enterprise Platform for Managing Kubernetes Everywhere
+Rancher is a platform built to address the needs of the DevOps teams deploying applications with Kubernetes, and the IT staff responsible for delivering an enterprise-critical service.
+```
+
+## Preparation
+
+The following placeholders will be used:
+
+-   `rancher.company` is the FQDN of the Rancher Install
+-   `passbook.company` is the FQDN of the passbook Install
+
+Create an application in passbook and note the slug, as this will be used later. Create a SAML Provider with the following Parameters:
+
+-   ACS URL: `https://rancher.company/v1-saml/adfs/saml/acs`
+-   Audience: `https://rancher.company/v1-saml/adfs/saml/metadata`
+-   Issuer: `passbook`
+
+You can of course use a custom Signing Certificate, and adjust the Assertion Length.
+
+## Rancher
+
+![](./rancher.png)