Use local Quartz mirror instead of GitHub

Clone from forge.ops.eblu.me to avoid external dependencies during builds.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.forgejo/workflows/build-blumeops.yaml

@@ -47,8 +47,8 @@ jobs:
           echo "NPM version: $(npm --version)"
 
           echo "Setting up Quartz..."
-          # Clone Quartz to a temp directory
-          git clone --depth 1 https://github.com/jackyzha0/quartz.git /tmp/quartz
+          # Clone Quartz from local mirror
+          git clone --depth 1 https://forge.ops.eblu.me/eblume/quartz.git /tmp/quartz
           cd /tmp/quartz
 
           # Install dependencies