Distinguish K8up Version in Search Results

[tobru]

The search results in the K8up.io site doesn't show nicely to which version a link belongs to. It should be clear to which version a search result belongs to.

[akosma]

The backend functionality of this PR is implemented by the following PRs in their corresponding projects:

• https://github.com/vshn/antora-indexer-cli/pull/131
• https://github.com/vshn/embedded-search-engine/pull/3

This MR will now care about the customization of the search results on the corresponding page of the documentation.

[akosma]

The corresponding Docker images are:

• vshn/antora-indexer-cli:1.10
• vshn/embedded-search-engine:1.4

[akosma]

Deployed!