docs: document mTLS configuration for NiFi 2.x monitoring #2454

Job	Run time
Run Rustfmt	21s
Run Cargo Deny (bans licenses sources)	45s
Run Cargo Deny (advisories)	44s
Decide if Helm charts are pushed to the helm repository based on action trigger	2s
Run Cargo Udeps	1m 54s
Run Clippy	29s
Run RustDoc	1m 17s
Check if committed README is the one we would render from the available parts	24s
Check if committed Helm charts are up to date	40s
Run Cargo Tests	43s
All tests passed	4s
Package Charts, Build Docker Image and publish them - ubicloud-standard-8-arm	9m 20s
Package Charts, Build Docker Image and publish them - ubuntu-latest	14m 30s
Build and publish manifest list	48s
Run the OpenShift Preflight check on the published images	16s
	32m 17s

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