[TASK] Do not persist GitHub credentials on CI (#1630)

https://docs.zizmor.sh/audits/#artipacked

Part of #1628

Author: oliverklee

.github/workflows/ci.yml

@@ -21,6 +21,8 @@ jobs:
         steps:
             - name: Checkout
               uses: actions/checkout@v7
+              with:
+                persist-credentials: false
 
             - name: Install PHP
               uses: shivammathur/setup-php@v2
@@ -64,6 +66,8 @@ jobs:
         steps:
             - name: Checkout
               uses: actions/checkout@v7
+              with:
+                persist-credentials: false
 
             - name: Install PHP
               uses: shivammathur/setup-php@v2
@@ -114,6 +118,8 @@ jobs:
         steps:
             - name: Checkout
               uses: actions/checkout@v7
+              with:
+                persist-credentials: false
 
             - name: Install PHP
               uses: shivammathur/setup-php@v2

.github/workflows/codecoverage.yml

@@ -23,6 +23,8 @@ jobs:
         steps:
             - name: Checkout
               uses: actions/checkout@v7
+              with:
+                persist-credentials: false
 
             - name: Install PHP
               uses: shivammathur/setup-php@v2