update README

Author: Dengda98

README.md

@@ -5,7 +5,6 @@
 <p align="center">
   <img alt="GitHub code size in bytes" src="https://img.shields.io/github/languages/code-size/Dengda98/PyFMM-GUI">
   <img alt="GitHub License" src="https://img.shields.io/github/license/Dengda98/PyFMM-GUI">
-  <img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/Dengda98/PyFMM-GUI/update_version.yml?label=update%20version">
   <img alt="GitHub Actions Workflow Status" src="https://img.shields.io/github/actions/workflow/status/Dengda98/PyFMM-GUI/publish_pypi.yml?label=pypi%20publish">
 </p>