CI: build: fix registry login 2

.forgejo/workflows/build.yaml

@@ -15,6 +15,7 @@ jobs:
       image: tiptop:5000/python-ci
       volumes:
         - "/root/.cache/uv:uv_cache"
+        - "/etc/containers/certs.d:ca-cert"
     services:
       treetrail-database:
         image: treetrail-database
@@ -24,6 +25,10 @@ jobs:
         run: |
           echo '${{ toJSON(env) }}'
 
+      - name: check /etc/containers
+        run: |
+          find /etc/containers/
+
       - uses: actions/checkout@v4
 
       - name: Create venv