Update README.md

Fix link url for llama.cpp release

README.md

@@ -36,7 +36,7 @@ lm_studio:
 
 **Model creator:** [Google](https://huggingface.co/google)<br>
 **Original model**: [google/codegemma-1.1-7b-it](https://huggingface.co/google/codegemma-1.1-7b-it)<br>
-**GGUF quantization:** provided by [bartowski](https://huggingface.co/bartowski) based on `llama.cpp` release [b2777](https://github.com/ggerganov/llama.cpp/releases/tag/b28777)<br>
+**GGUF quantization:** provided by [bartowski](https://huggingface.co/bartowski) based on `llama.cpp` release [b2777](https://github.com/ggerganov/llama.cpp/releases/tag/b2777)<br>
 
 ## Model Summary:
 CodeGemma 1.1 7b Instruct is an iteration on the initial CodeGemma release. It should come with minor improvements to code generation.<br>