Update esp-idf-svc to 0.51

[ivmarkov]

Thank you for your contribution!

We appreciate the time and effort you've put into this pull request.
To help us review it efficiently, please ensure you've gone through the following checklist:

Submission Checklist 📝

• [v] I have updated existing examples or added new ones (if applicable).
• [v] I have used cargo fmt command to ensure that all changed code is formatted correctly.
• [v] I have used cargo clippy command to ensure that all changed code passes latest Clippy nightly lints.
• [v] My changes were added to the CHANGELOG.md in the proper section.

Pull Request Details 📖

Description

Subject says it all.
esp-idf-svc 0.51 was necessary because of the embassy-time V0.4 rush

Testing

n/a

[Vollbrecht]

Thanks!