Potential fix for code scanning alert no. 6: Workflow does not contain permissions (#26)

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: achamayou

.github/workflows/build-docs.yml

@@ -14,6 +14,8 @@ jobs:
   build:
     name: Sphinx Build
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
 
     steps:
     - name: Check out sources