chore: run zizmor fixes (#21)

Author: frafra

.github/workflows/pkgdown.yaml

@@ -24,6 +24,8 @@ jobs:
       contents: write
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - uses: r-lib/actions/setup-pandoc@v2
 

.github/workflows/r.yml

@@ -28,6 +28,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+        with:
+          persist-credentials: false
 
       - uses: r-lib/actions/setup-pandoc@v2