gguf-py : do not use title case for naming convention

Some models use acronyms in lowercase,
which can't be title-cased like other words,
so it's best to simply use the same case
as in the original model name.

Note that the size label still has an uppercased suffix
to make it distinguishable from the context size of a finetune.

gguf-py/gguf/utility.py

@@ -50,15 +50,15 @@ def naming_convention(model_name: str | None, base_name: str | None, finetune_st
     # Reference: https://github.com/ggerganov/ggml/blob/master/docs/gguf.md#gguf-naming-convention
 
     if base_name is not None:
-        name = base_name.strip().title().replace(' ', '-').replace('/', '-')
+        name = base_name.strip().replace(' ', '-').replace('/', '-')
     elif model_name is not None:
-        name = model_name.strip().title().replace(' ', '-').replace('/', '-')
+        name = model_name.strip().replace(' ', '-').replace('/', '-')
     else:
         name = "ggml-model"
 
     parameters = f"-{size_label}" if size_label is not None else ""
 
-    finetune = f"-{finetune_string.strip().title().replace(' ', '-')}" if finetune_string is not None else ""
+    finetune = f"-{finetune_string.strip().replace(' ', '-')}" if finetune_string is not None else ""
 
     version = f"-{version_string.strip().replace(' ', '-')}" if version_string is not None else ""