docs: clarify Hive 4 support #2083

Job	Run time
Run Cargo Deny (advisories)	45s
Run Rustfmt	19s
Run Clippy	35s
Run Cargo Udeps	1m 55s
Run RustDoc	1m 13s
Run Cargo Tests	30s
Run Cargo Deny (bans licenses sources)	45s
Check if committed Helm charts are up to date	45s
Check if committed README is the one we would render from the available parts	30s
Decide if Helm charts are pushed to the helm repository based on action trigger	4s
All tests passed	4s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 26s
Package Charts, Build Docker Image and publish them - ubuntu-latest	11m 44s
Build and publish manifest list	50s
Run the OpenShift Preflight check on the published images	22s
	29m 47s

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