Updated whisper.cpp to 1.5.1 (#65)

* Update whisper to 1.5.1

* Update README.md

* Update build_cpp.yml

.github/workflows/build_cpp.yml

@@ -9,7 +9,7 @@ on:
  whisper_cpp_repo_ref:
  description: 'Tag, branch or commit'
  required: true
- default: 'v1.5.0'
+ default: 'v1.5.1'
 jobs:
  build-windows:
  name: Build for Windows (x86_64)

README.md

@@ -1,5 +1,5 @@
 # whisper.unity
-[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://opensource.org/licenses/MIT) [![whisper.cpp](https://img.shields.io/badge/whisper.cpp-v1.5.0-green)](https://github.com/ggerganov/whisper.cpp/releases/tag/v1.5.0)
+[![License: MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://opensource.org/licenses/MIT) [![whisper.cpp](https://img.shields.io/badge/whisper.cpp-v1.5.1-green)](https://github.com/ggerganov/whisper.cpp/releases/tag/v1.5.1)
 
 [![Testing](https://github.com/Macoron/whisper.unity/actions/workflows/test.yml/badge.svg)](https://github.com/Macoron/whisper.unity/actions/workflows/test.yml)
 
@@ -16,7 +16,7 @@ This is Unity3d bindings for the [whisper.cpp](https://github.com/ggerganov/whis
 
 **Supported platforms:**
 - [x] Windows (x86_64, [optional CUDA](#cuda-support))
-- [x] MacOS (Intel and ARM)
+- [x] MacOS (Intel and ARM, [optional Metal](#metal-support))
 - [x] Linux (x86_64, [optional CUDA](#cuda-support))
 - [x] iOS (Device and Simulator)
 - [x] Android (ARM64)
@@ -44,7 +44,12 @@ https://github.com/Macoron/whisper.unity.git?path=/Packages/com.whisper.unity
 
 To run inference with CUDA, you would need to have supported GPU and installed CUDA Toolkit (tested with [12.2.0](https://developer.nvidia.com/cuda-12-2-0-download-archive)). 
 
-After that go to the **Project Settings => Whisper => Enable CUDA**. This should force package use library compiled for CUDA.
+After that go to the **Project Settings => Whisper => Enable CUDA**. This should force package to use library compiled for CUDA.
+
+### Metal Support
+> Whisper.cpp supports Metal only on [Apple7 GPUs](https://developer.apple.com/documentation/metal/mtlgpufamily) family or newer (starting from Apple M1 chips). Trying to run on older hardware will fallback to CPU inference.
+
+To activate Metal inference, go to **Project Settings => Whisper => Enable Metal**. This should force package to use library compiled for Metal.
 
 ### Downloading other model weights
 You can try different Whisper model weights. For example, you can improve English language transcription by using English-only weights or by trying bigger models.
@@ -58,7 +63,7 @@ This project comes with prebuild libraries of whisper.cpp for all supported plat
 
 In case you want to build libraries on your machine:
 1. Clone the original [whisper.cpp](https://github.com/ggerganov/whisper.cpp) repository
-2. Checkout tag [v1.5.0](https://github.com/ggerganov/whisper.cpp/tree/v1.5.0). Other versions might not work with this Unity bindings.
+2. Checkout tag [v1.5.1](https://github.com/ggerganov/whisper.cpp/tree/v1.5.1). Other versions might not work with this Unity bindings.
 3. Open whisper.unity folder with command line
 4. If you are using **Windows** write:
 ```bash