[build] Use explicit write perms

Author: Breakthrough

.github/workflows/generate-docs.yml

@@ -13,6 +13,8 @@ on:
 jobs:
   update_docs:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  # pushes generated docs to the gh-pages branch
     env:
       scenedetect_docs_dest: ''
 

.github/workflows/generate-website.yml

@@ -12,6 +12,8 @@ on:
 jobs:
   update_site:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  # pushes generated site to the gh-pages branch
 
     steps:
       - uses: actions/checkout@v5