fix(docs): Update getting-started script pre-25.11.0

[labrenbe]

Description

Part of stackabletech/issues#791

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[adwk67]

LGTM. If you want to switch nifi to using external-stable (like I think we have done for most other GS-guides), this patch (+templating) should do it (I tested it with both helm & stackablectl, but I'll leave it up to you):

@@ -28,7 +28,7 @@ echo "Installing Operators with Helm"
 # tag::helm-install-operators[]
 helm install --wait commons-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/commons-operator --version {{ versions.commons }}
 helm install --wait secret-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/secret-operator --version {{ versions.secret }}
-helm install --wait listener-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/listener-operator --version {{ versions.listener }}
+helm install --wait listener-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/listener-operator --version {{ versions.listener }} --set preset=stable-nodes
 helm install --wait nifi-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/nifi-operator --version {{ versions.nifi }}
 # end::helm-install-operators[]
 ;;
@@ -90,7 +90,7 @@ spec:
       autoGenerate: true
   nodes:
     roleConfig:
-      listenerClass: external-unstable
+      listenerClass: external-stable
     roleGroups:
       default:
         replicas: 1

N.B. requires stackablectl-1.2.0

[Techassi]

@labrenbe gave me the go-ahead to merge his PR.