Update update_site.yml

Author: britzl

.github/workflows/update_site.yml

@@ -10,7 +10,7 @@ jobs:
         steps: [
             { name: 'Checkout', uses: actions/checkout@v1, with: { fetch-depth: 1 } },
             { name: 'Install Python', uses: actions/setup-python@v4, with: { python-version: 3.10.5, architecture: x64 } },
-            { name: 'Install Java', uses: actions/setup-java@v3, with: { java-version: '17.0.5+8', distribution: 'temurin'} },
+            { name: 'Install Java', uses: actions/setup-java@v3, with: { java-version: '21.0.5+11.0.LTS', distribution: 'temurin'} },
             { name: 'Install Lunr', run: 'pip install --user lunr==0.5.5' },
             { name: 'Install Requests', run: 'pip install --user requests' },
             { name: 'Install PyYAML', run: 'pip install --user pyyaml' },