ci(hugo): upgrade Hugo version to 0.155.1 and fix sitemap permissions

* Updated HUGO_VERSION from 0.154.4 to 0.155.1
* Changed sitemap permissions handling to remove the file instead of modifying permissions
* Ensured Node.js dependencies are installed from the 'src' directory

Author: suvl

.github/workflows/hugo.yaml

@@ -23,7 +23,7 @@ jobs:
     env:
       DART_SASS_VERSION: 1.97.2
       GO_VERSION: 1.25.5
-      HUGO_VERSION: 0.154.4
+      HUGO_VERSION: 0.155.1
       NODE_VERSION: 24.12.0
       TZ: Europe/Lisbon
     steps:
@@ -76,6 +76,7 @@ jobs:
           echo "Node.js: $(node --version)"
 
       - name: Install Node.js dependencies
+        working-directory: src
         run: |
           [[ -f package-lock.json || -f npm-shrinkwrap.json ]] && npm ci || true
 
@@ -97,7 +98,7 @@ jobs:
         # add +w permission to public/sitemap.xml if it exists
         run: |
           if [ -f ./public/sitemap.xml ]; then
-            chmod +w ./public/sitemap.xml
+            rm -rf ./public/sitemap.xml
           fi
 
       - name: Build the site