Bump Zola version to 0.22.1 in deploy workflow

0.19.2 expects config.toml but this project uses zola.toml,
which is supported in newer Zola versions.

.forgejo/workflows/deploy.yml

@@ -16,7 +16,7 @@ jobs:
 
       - name: Install Zola
         run: |
-          ZOLA_VERSION="0.19.2"
+          ZOLA_VERSION="0.22.1"
           wget -q "https://github.com/getzola/zola/releases/download/v${ZOLA_VERSION}/zola-v${ZOLA_VERSION}-x86_64-unknown-linux-gnu.tar.gz" -O /tmp/zola.tar.gz
           tar -xzf /tmp/zola.tar.gz -C /usr/local/bin
           zola --version