update: actually _do_ persist dependencies

Author: hynek

.github/workflows/update-dependencies.yml

@@ -28,7 +28,7 @@ jobs:
 
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
-          persist-credentials: false
+          persist-credentials: true  # we need them later
 
       # START PYTHON DEPENDENCIES
       - name: Install uv