fix zizmor findings

.github/workflows/ci.yml

@@ -2,6 +2,9 @@ name: Continuous Integration
 
 on: pull_request
 
+permissions:
+  contents: read
+
 jobs:
   build:
 
@@ -13,6 +16,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        persist-credentials: false
     - name: Set up Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
       with:

.github/workflows/nightly.yml

@@ -22,6 +22,9 @@ on:
   repository_dispatch:
     types: [firebase_nightly_build]
 
+permissions:
+  contents: read
+
 jobs:
   nightly:
 
@@ -32,6 +35,7 @@ jobs:
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       with:
         ref: ${{ github.event.client_payload.ref || github.ref }}
+        persist-credentials: false
 
     - name: Set up Node.js
       uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0

.github/workflows/release.yml

@@ -32,6 +32,9 @@ on:
     types:
       - firebase_build
 
+permissions:
+  contents: read
+
 jobs:
   stage_release:
     # To publish a release, merge a PR with the title prefix '[chore] Release ' to main
@@ -47,6 +50,8 @@ jobs:
     steps:
     - name: Checkout source for staging
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        persist-credentials: false
 
     - name: Set up Node.js
       uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
@@ -110,6 +115,8 @@ jobs:
     steps:
     - name: Checkout source for publish
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      with:
+        persist-credentials: false
 
     # Download the artifacts created by the stage_release job.
     - name: Download release candidates