Fix typo Update 01_concepts.md

[MonkeyKing44]

Pull Request Title

Fix typo Update 01_concepts.md

Description

This PR fixes a typo in the 01_concepts.md file. The word "protocal" has been corrected to "protocol."

Changes:

• Corrected the typo: "protocal" → "protocol" in the 01_concepts.md file.

Related Issues

• Merge pull request from GHSA-f92v-grc2-w2fg evmos/ethermint#1234 (replace with relevant issue number, if applicable)

How to Test

• Review the 01_concepts.md file to ensure the typo has been corrected.

Checklist:

• The code has been tested.
• The documentation has been updated (if necessary).
• I have followed the contributing guidelines.

Notes:

• This is a minor fix and does not affect the functionality of the project.