Fix SSH architecture diagram

What does this MR do?

In !27421 (merged) we added mermaid diagrams for HTTP + SSH connections. However, we accidentally merged the wrong revision of the SSH diagram!

This MR corrects it to use the diagram in !27421 (comment 310436202) instead of the older one in !27421 (comment 306418666)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Documentation