Hash-pin html5validator-action

Author: krassowski

.github/workflows/validate.yml

@@ -53,7 +53,7 @@ jobs:
       run: git init
 
     - name: HTML5 Validator
-      uses: Cyb3r-Jak3/html5validator-action@v7.0.0
+      uses: Cyb3r-Jak3/html5validator-action@44696509d19bec6bd00e5ebf29bbeda320562aac
       with:
         root: _site/