Bust badge cache in README

Author: crmne

README.md

@@ -12,7 +12,7 @@ A delightful Ruby way to work with AI. No configuration madness, no complex call
   <img src="https://upload.wikimedia.org/wikipedia/commons/e/ec/DeepSeek_logo.svg" alt="DeepSeek" height="40" width="120">
 </div>
 
-<a href="https://badge.fury.io/rb/ruby_llm"><img src="https://badge.fury.io/rb/ruby_llm.svg?dummy=unused" alt="Gem Version" /></a>
+<a href="https://badge.fury.io/rb/ruby_llm"><img src="https://badge.fury.io/rb/ruby_llm.svg" alt="Gem Version" /></a>
 <a href="https://github.com/testdouble/standard"><img src="https://img.shields.io/badge/code_style-standard-brightgreen.svg" alt="Ruby Style Guide" /></a>
 <a href="https://rubygems.org/gems/ruby_llm"><img alt="Gem Downloads" src="https://img.shields.io/gem/dt/ruby_llm"></a>
 <a href="https://codecov.io/gh/crmne/ruby_llm"><img src="https://codecov.io/gh/crmne/ruby_llm/branch/main/graph/badge.svg" alt="codecov" /></a>