ci: Remove persist-credentials from our CI workflows

This mitigates a potential security risk identified by zizmor.

.github/workflows/build.yml

@@ -26,6 +26,8 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
         name: Install Python
         with:
@@ -51,6 +53,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
         name: Install Python
         with:

.github/workflows/test.yml

@@ -18,6 +18,8 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
         name: Install Python
         with:
@@ -65,6 +67,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
         name: Install Python
         with:
@@ -88,6 +92,8 @@ jobs:
     runs-on: windows-2022
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - uses: actions/setup-python@v5
         name: Install Python
         with: