docs: Fix up Cilium config link (again) & icons (#1176)

**What problem does this PR solve?**:

I messed up the link in #1173, sorry! At the same time I noticed icons
being reused so cleaned those up so things are pretty again!

**Which issue(s) this PR fixes**:
Fixes #

**How Has This Been Tested?**:
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Author: jimmidyson

docs/content/addons/cni.md

@@ -62,7 +62,7 @@ spec:
 
 NOTE: Only ConfigMap kind objects will be allowed to refer helm values from.
 
-ConfigMap Format -
+ConfigMap Format:
 
 ```yaml
 apiVersion: v1
@@ -134,4 +134,9 @@ deploying cluster-api-runtime-extensions-nutanix chart:
 ```
 
 [Cluster API Add-on Provider for Helm]: https://github.com/kubernetes-sigs/cluster-api-addon-provider-helm
-[default Cilium configuration]: https://github.com/nutanix-cloud-native/cluster-api-runtime-extensions-nutanix/blob/v{{< param "version" >}}/charts/cluster-api-runtime-extensions-nutanix/addons/cni/cilium/values-template.yaml {{< mdl-disable "<!-- markdownlint-disable MD013 MD034 -->" >}}
+
+{{< mdl-disable "<!-- markdownlint-disable MD013 MD034 -->" >}}
+
+[default Cilium configuration]: https://github.com/nutanix-cloud-native/cluster-api-runtime-extensions-nutanix/blob/v{{< param "version" >}}/charts/cluster-api-runtime-extensions-nutanix/addons/cni/cilium/values-template.yaml
+
+{{< mdl-disable "<!-- markdownlint-restore -->" >}}

docs/content/addons/cosi.md

@@ -1,6 +1,6 @@
 +++
 title = " Container Object Storage Interface (COSI)"
-icon = "fa-solid fa-eye"
+icon = "fa-solid fa-object-group"
 +++
 
 By leveraging CAPI cluster lifecycle hooks, this handler deploys [Container Object Storage Interface] (COSI)

docs/content/addons/registry.md

@@ -1,6 +1,6 @@
 +++
 title = "Registry"
-icon = "fa-solid fa-eye"
+icon = "fa-solid fa-cubes"
 +++
 
 By leveraging CAPI cluster lifecycle hooks, this handler deploys an OCI [Distribution] registry,