Update metadata (general.architecture, tokenizer.ggml.model, tokenizer.ggml.pre)

Updated metadata:
* **general.architecture**: gpt-oss:20b
* **tokenizer.ggml.model**: gpt-oss:20b
* **tokenizer.ggml.pre**: gpt-oss:20b

codette-ultimate.gguf

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:a8bd1c058b645cea425577e2ef6abd3e937625c708742e6e6e8027d7a7325980
-size 252471360
+oid sha256:285a4fd3d2a0b9d19b39d483345d17a7948cf548664e2916cf723e04e330035d
+size 252471392