Update README.md

Author: uhlhosting

README.md

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 [![Build NGINX Unit with PHP Support](https://github.com/uhlhosting/Unit-PHP/actions/workflows/build.yml/badge.svg)](https://github.com/uhlhosting/Unit-PHP/actions/workflows/build.yml)
-# NGINX Unit with PHP and NJS Support
+# NGINX Unit with PHP and NJS Support [WIP]
 
 This repository contains the build configuration for NGINX Unit with support for multiple PHP versions and NJS (NGINX JavaScript). It utilizes GitLab CI/CD to automate the build process and produces separate binaries for each specified PHP version.