Fix Typos in LightClient.t.sol and api.rs

[teenager-ETH]

Fix Typos in LightClient.t.sol and api.rs

Description

This pull request fixes minor typos in the following files:

1. contracts/test/LightClient.t.sol:

   • Corrected initiazing to initializing in a comment.

2. sequencer/src/api.rs:

   • Fixed atleast to at least in a log message.

Changes

• These changes improve code readability and maintain high-quality documentation and logs.
• No functional changes: The updates are purely related to comments and log messages.

Context

Maintaining proper spelling and clarity in comments and logs ensures better code quality and easier maintenance for all contributors.

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Feel free to suggest additional improvements!