[Feature]: Add good-second-issue label

[platten]

Is there an existing issue for this?

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Description

Add a label which is available on all enarx org repositories for good-second-issue. This label assumes familiarity with the code base and preferably Rust as well.

Acceptance Criteria

• Add label to manage-your-labels.yml
• Update user facing documentation with new label.

Suggestions for a technical implementation

No response