ci: PHP via apt in a bookworm container, retry shopware-cli download

setup-php hangs on the runner even with runner=self-hosted; the CLI download
returned a non-gzip body once under concurrent load.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -50,7 +50,8 @@ jobs:
       - name: Install shopware-cli
         if: steps.meta.outputs.skip == 'false'
         run: |
-          curl -sL https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz | tar -xz -C /tmp shopware-cli
+          curl -fsSL --retry 5 --retry-delay 10 -o /tmp/swcli.tgz https://github.com/shopware/shopware-cli/releases/latest/download/shopware-cli_Linux_x86_64.tar.gz
+          tar -xzf /tmp/swcli.tgz -C /tmp shopware-cli
           sudo install /tmp/shopware-cli /usr/local/bin/shopware-cli || install /tmp/shopware-cli /usr/local/bin/shopware-cli
 
       - name: Validate extension