make git module accessible anonymously

Your Name · Your Name · commit 0b079a658c57 · 2023-05-20T02:25:59.000+01:00
diff --git a/.gitmodules b/.gitmodules
@@ -1,3 +1,3 @@
 [submodule "vendor/llama.cpp"]
 	path = vendor/llama.cpp
-	url = git@github.com:ggerganov/llama.cpp.git
+	url = https://github.com/ggerganov/llama.cpp.git
