Update granite-speech-4.1-2b model card with measured RTF/RAM

Update card: measured peak RSS after ggml-dim pack rebuild

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-fp16.oasr

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-q8_0.oasr

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-q4_k.oasr

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-fp16.oasr

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-q8_0.oasr

Publish granite-speech-4.1-2b: granite-speech-4.1-2b-q4_k.oasr

Publish granite-speech-4.1-2b: README.md

initial commit