chore: polish made-by-vercel badge

[LitoMore]

Preview

Before	After

How?

Typically, a shields.io badge consists of three parts: icon, label, and message. Here is a simplest badge with for-the-badge style:

https://img.shields.io/badge/label-message-blue?logo=vercel&style=for-the-badge

Here is the previously made-by-vercel badge with in colors (icon + message):

https://img.shields.io/badge/MADE%20BY%20Vercel-000000.svg?style=for-the-badge&logo=Vercel

We should use the "icon + label" to avoid the wide gap between the icon and text. Here is the polished badge (icon + label):

Why?

I'm the active contributor of the https://github.com/badges/shields project. I'm also the maintainer of https://github.com/simple-icons/simple-icons (the icon provider of shields.io). So I am very sensitive to the style of this badge.

Although this is a one-line contribution PR for a documentation update, I'd like to elaborate on my reasoning for submitting it. Thanks for reading.

[ijjk]

Allow CI Workflow Run

• approve CI run for commit: 3b18d05

Note: this should only be enabled once the PR is ready to go and can only be enabled by a maintainer