fix(ci): remove non-existent check:mdx and set global puppeteer env

.gitea/workflows/ci.yml

@@ -10,6 +10,8 @@ concurrency:
 jobs:
   quality-assurance:
     runs-on: docker
+    env:
+      PUPPETEER_EXECUTABLE_PATH: /usr/bin/chromium
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -58,8 +60,7 @@ jobs:
       - name: 🧪 QA Checks
         env:
           TURBO_TELEMETRY_DISABLED: "1"
-          PUPPETEER_EXECUTABLE_PATH: /usr/bin/chromium
-        run: npx turbo run check:mdx lint typecheck test --cache-dir=".turbo"
+        run: npx turbo run lint typecheck test --cache-dir=".turbo"
 
       - name: 🏗️ Build
         run: pnpm build