fix(ci): install zip in release workflow

Forgejo Composer API requires zip format.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/workflows/release.yml

@@ -13,6 +13,7 @@ jobs:
 
       - name: Create package archive
         run: |
+          apt-get update && apt-get install -y zip
           zip -r package.zip . \
             -x ".forgejo/*" \
             -x ".git/*" \