chore: migrate llama.cpp submodule to ggml-org (abetlen#2034)

Co-authored-by: abetlen <abetlen@gmail.com>

Author: shalinib-ibm

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "vendor/llama.cpp"]
 	path = vendor/llama.cpp
-	url = https://github.com/ggerganov/llama.cpp.git
+	url = https://github.com/ggml-org/llama.cpp.git

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 - feat: Update llama.cpp to ggerganov/llama.cpp@91e84fed6 and sync Python bindings
+- chore: Migrate llama.cpp submodule URL to ggml-org/llama.cpp by @shalinib-ibm in #2034
 - fix: Enable unified KV cache for embedding contexts to preserve full per-sequence context in batch embedding calls by @SanjanaB123 in #2217
 
 ## [0.3.23]