remove test badge

Author: Z-Ghostshell

README.md

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   <img src="https://res.bizs.app/web/ghost/icon/ghost-main.webp" width="128" height="128" alt="Ghost in the Shell" />
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-<h1 align="center">Ghost in the Shell</h1>[![test](https://github.com/Z-Ghostshell/ghost/actions/workflows/test.yml/badge.svg)](https://github.com/Z-Ghostshell/ghost/actions/workflows/test.yml)
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 <p align="center">
   <strong>Many AI agents on one host</strong> — each with personality, purpose, rules, and tools. Agents think, act, observe, and remember. They coordinate through schedules, channels (including Slack), inter-agent messaging, and optional <strong>Ghost Whisper</strong> evaluation on the heartbeat path.
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