Updated LibTorch on CI

Author: ankane

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
           - ruby: 3.1
             os: ubuntu-22.04
     env:
-      LIBTORCH_VERSION: 2.7.0
+      LIBTORCH_VERSION: 2.7.1
     steps:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1

README.md

@@ -17,7 +17,7 @@ Check out:
 First, [download LibTorch](https://pytorch.org/get-started/locally/). For Mac arm64, use:
 
 ```sh
-curl -L https://download.pytorch.org/libtorch/cpu/libtorch-macos-arm64-2.7.0.zip > libtorch.zip
+curl -L https://download.pytorch.org/libtorch/cpu/libtorch-macos-arm64-2.7.1.zip > libtorch.zip
 unzip -q libtorch.zip
 ```