update sedna controller(Joint Inference and Federated Learning) proposal

[SherlockShemol]

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What this PR does / why we need it: update sedna controller(Joint Inference and Federated Learning) proposal Which issue(s) this PR fixes:

Fixes #

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[tangming1996]

Please optimize all the figures in the proposal. Currently, these figures look too large and not very coordinated. The color of the figures had better be light colors. Dark colors look very glaring. The color of each module in the figure should be meaningful and not just for coloring. You can learn from classmate Yuda's proposal: https://github.com/kubeedge/ianvs/blob/main/docs/proposals/algorithms/federated-class-incremental-learning/Federated%20Class-Incremental%20and%20Semi-Supervised%20learning%20Proposal.md.

[tangming1996]

The content of this PR is submitted to 448.