docs: Don't mark pre-upgrade step as "recommended"
docs: Don't mark pre-upgrade step as "recommended"

In the upgrade guide, we recommend to first upgrade to the latest patch
release before upgrading to a new minor release, to ensure downgrade
will work if ever needed. This commit removes the "Recommended" tag on
the step title. The worry is that a user who goes a bit too quickly
through the guide may skip that step just because it's marked
"recommended". Instead the user should read the short text to make an
informed decision.

Signed-off-by: Paul Chaignon <a027184a55211cd23e3f3094f1fdc728df5e0500@cilium.io>

cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,cilium/cilium