Use the variable to skip the checkout

Author: k0kubun

.github/actions/setup/directories/action.yml

@@ -75,7 +75,8 @@ runs:
         git config --global advice.detachedHead 0
         git config --global init.defaultBranch garbage
 
-    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+    - if: inputs.checkout
+      uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
       with:
         path: ${{ inputs.srcdir }}