Update old MacOS dependency

Author: dimo414

.github/workflows/rust.yml

@@ -43,7 +43,7 @@ jobs:
           - { target: arm-unknown-linux-gnueabihf , os: ubuntu-20.04 , use-cross: true                }
           - { target: i686-unknown-linux-gnu      , os: ubuntu-20.04 , use-cross: true                }
           - { target: i686-unknown-linux-musl     , os: ubuntu-20.04 , use-cross: true                }
-          - { target: x86_64-apple-darwin         , os: macos-12                                      }
+          - { target: x86_64-apple-darwin         , os: macos-14                                      }
           - { target: aarch64-apple-darwin        , os: macos-14                                      }
           - { target: x86_64-pc-windows-msvc      , os: windows-2019                   , suffix: .exe }
           - { target: x86_64-unknown-linux-gnu    , os: ubuntu-20.04                                  }