update vanity-go

Author: nikandfor

.github/workflows/vanity.yaml

@@ -20,11 +20,11 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Generate Vanity Files
-        uses: nikandfor/vanity-go@master
+        uses: nikandfor/vanity-go@v0.3.0
         with:
           vanity_file: vanity.yaml
           output_dir: _site
-          generator_version: master
+          generator_version: v0.3.0
 
       - name: Setup Pages
         uses: actions/configure-pages@v5