Update minikube/openshift upgrade instructions #2383
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Description
This PR updates the Kubernetes upgrade instructions for both Minikube and OpenShift deployments.
These changes align the Kubernetes documentation with the instructions in our Docker Compose documentation, ensuring consistency across platforms.
Changes
Sequential Upgrades: Adds a note emphasizing that upgrades must be performed sequentially, one version at a time (e.g.,$\rightarrow$ $\rightarrow$
4.0.04.0.14.1.0).--fromVersionFlag Usage: Adds an info banner explaining that the--fromVersionflag is mandatory for upgrades to versions prior to3.9.1, providing a specific example.CE to PE Migration: Clarifies the Community Edition (CE) to Professional Edition (PE) migration process. It now explicitly states that the upgrade script must be run with the
--fromVersion=CEflag (Step 4) to correctly migrate the database data.PE

CE
