Remove old credentials substition

+ add feature gate example

Signed-off-by: Hans Rakers <[email protected]>

Author: hrak

docs/book/src/development/tilt.md

@@ -35,13 +35,23 @@ Next, create a `tilt-settings.json` file and place it in your local copy of `clu
 
 **Example `tilt-settings.json` for CAPC clusters:**
 
+```json
+{
+    "default_registry": "gcr.io/your-project-name-here",
+    "provider_repos": ["../cluster-api-provider-cloudstack"],
+    "enable_providers": ["kubeadm-bootstrap", "kubeadm-control-plane", "cloudstack"]
+}
+```
+
+**Example `tilt-settings.json` for CAPC clusters with experimental feature gate:**
+
 ```json
 {
     "default_registry": "gcr.io/your-project-name-here",
     "provider_repos": ["../cluster-api-provider-cloudstack"],
     "enable_providers": ["kubeadm-bootstrap", "kubeadm-control-plane", "cloudstack"],
     "kustomize_substitutions": {
-        "CLOUDSTACK_B64ENCODED_CREDENTIALS": "RANDOM_STRING==",
+        "EXP_KUBEADM_BOOTSTRAP_FORMAT_IGNITION": "true",
     }
 }
 ```