add de_DE locale

.github/workflows/release.yml

@@ -34,6 +34,11 @@ jobs:
     runs-on: ubuntu-latest
     environment: staging
     steps:
+      - name: Add de_DE.UTF-8 locale
+        run: |
+          apt-get update
+          apt-get -y install locales
+          locale-gen de_DE.UTF-8
       - name: Checkout
         uses: actions/checkout@v3
         with: