fix(ci): macOS CI fails with "Unrecognized archive format"

    Run curl -LO 'https://github.com/neovim/neovim/releases/download/nightly/nvim-macos.tar.gz'
    tar: Error opening archive: Unrecognized archive format

ref: neovim/neovim@036f86f

Author: justinmk

.github/workflows/ci.yml

@@ -20,15 +20,15 @@ jobs:
       fail-fast: false
       matrix:
         node: ['14', '16', '18']
-        os: ['ubuntu-latest', 'macos-11', 'windows-latest']
+        os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
         include:
         - os: ubuntu-latest
           NIGHTLY: nvim-linux64.tar.gz
           NVIM_BIN_PATH: nvim-linux64/bin
           EXTRACT: tar xzf
-        - os: macos-11
-          NIGHTLY: nvim-macos.tar.gz
-          NVIM_BIN_PATH: nvim-macos/bin
+        - os: macos-latest
+          NIGHTLY: nvim-macos-x86_64.tar.gz
+          NVIM_BIN_PATH: nvim-macos-x86_64/bin
           EXTRACT: tar xzf
         - os: windows-latest
           NIGHTLY: nvim-win64.zip