chore(forks): update blob base cost in forks

[gurukamath]

🗒️ Description

The blob_base_cost parameter in EIP-7918 was updated as per this PR and needs to be reflected in the tests

🔗 Related Issues or PRs

✅ Checklist

• All: Ran fast tox checks to avoid unnecessary CI fails, see also Code Standards and Enabling Pre-commit Checks:

  uvx --with=tox-uv tox -e lint,typecheck,spellcheck,markdownlint

• All: PR title adheres to the repo standard - it will be used as the squash commit message and should start type(scope):.
• All: Considered adding an entry to CHANGELOG.md.
• All: Considered updating the online docs in the ./docs/ directory.
• All: Set appropriate labels for the changes (only maintainers can apply labels).
• Tests: Ran mkdocs serve locally and verified the auto-generated docs for new tests in the Test Case Reference are correctly formatted.

[spencer-tb]

Tagging: #1862

[spencer-tb]

Thanks. LGTM!