🚧 Bump actions/checkout to v4

Author: jasonrudolph

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install Homebrew
       run: NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"