chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/zsh-n.yml

@@ -22,7 +22,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: ⤵️ Check out code from GitHub
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "⚡ Set matrix output"
         id: set-matrix
         run: |
@@ -37,7 +37,7 @@ jobs:
       matrix: ${{ fromJSON(needs.zsh-matrix.outputs.matrix) }}
     steps:
       - name: ⤵️ Check out code from GitHub
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: "⚡ Install dependencies"
         run: sudo apt update && sudo apt-get install -yq zsh
       - name: "⚡ zsh -n: ${{ matrix.file }}"

.github/workflows/zunit.yml

@@ -12,7 +12,7 @@ jobs:
     name: 🧪 Mac ZUnit CI
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: 📚 Molovo zunit
         run: |
           mkdir bin
@@ -39,7 +39,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: ℹ️ Setup linux dependencies
         run: |
           sudo apt update