trying to fix docs

Author: C-Achard

.github/workflows/build_docs.yml

@@ -21,7 +21,7 @@ jobs:
           set -x
           apt-get update
           apt-get install -y git
-          git clone "https://token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" .
+          git clone --depth 1 "https://token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" .
         shell: bash
 
       - name: Run build script for Sphinx pages