fix(docs): correct Ethereum typo

[leno23]

Summary

• Corrects the Etherum typo to Ethereum on the Differences between Ethereum and Base page.

Verification

• grep -R "Etherum" -n docs/base-chain/network-information/diffs-ethereum-base.mdx || true
• git diff --check

Closes #1440

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 2/2	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2

[cb-heimdall]

Review Error for malfifi10 @ 2026-05-19 13:14:22 UTC
User failed mfa authentication, either user does not exist or public email is not set on your github profile. \ see go/mfa-help

[danyalprout]

Thank you