Remove CNAME files before Jekyll build

Add steps to delete CNAME and _site/CNAME files before the Jekyll build
process in the GitHub Pages workflow. This prevents any existing CNAME
configurations from interfering with the deployment process.

The removal of these files ensures a clean build environment and avoids
potential conflicts with custom domain settings.

Author: solderzzc

.github/workflows/jekyll-gh-pages.yml

@@ -28,6 +28,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Remove CNAME file
+        run: |
+          rm -f CNAME
+          rm -f _site/CNAME || true
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Build with Jekyll