Update cluster-api module to v1.8.11

[kukacz]

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• Yes, I have read THIS NOTE DOC.

2. Contact Information(Optional)

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• CNCF Slack: @Lukáš Kubín

[liangyuanpeng]

LGTM

[kukacz]

@liangyuanpeng I've converted this to draft to prevent merge that would lead to downgrading the actual module. Let me explain:

• There were two PRs from me at the same time in open PR queue: This one (for module version v1.8.11) and Update cluster-api module to v1.9.6 #272 (for v1.9.6).
• I somewhat blindly assumed that they'll merge in chronological order, generating single release package per each version published in Artifact Hub. Idea was to deliver users both version options to pick from - v1.8 and v1.9.
• Since the newer release Update cluster-api module to v1.9.6 #272 got merged first, this change would practically downgraded the module in main branch now.

I am ok to cancel this PR, the impact is negligible. I would be grateful for any proposal how to deal better with similar usecase in the future.

[Peefy]

You can put multiple version of the package like the k8s module: https://github.com/kcl-lang/modules/tree/main/k8s