CI: use "persist-credentials: false" for actions/checkout

See https://woodruffw.github.io/zizmor/audits/#artipacked

.github/workflows/build.yml

@@ -15,6 +15,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: setup-msys2
         uses: msys2/setup-msys2@v2
@@ -72,6 +74,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: actions/download-artifact@v4
         with:
@@ -108,6 +112,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: actions/download-artifact@v4
         with:
@@ -141,6 +147,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: actions/download-artifact@v4
         with: