Fix site deployment

Author: jonasrutishauser

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Build with Maven
         run: mvn -B -V -e clean verify
       - name: Deploy Site
-        if: ${{ matrix.java == '1.8' && github.event_name != 'release' && !startsWith(github.event_name, 'pull_request') }}
+        if: ${{ matrix.java == '8' && github.event_name != 'release' && !startsWith(github.event_name, 'pull_request') }}
         run: mvn -B -e site-deploy
         env:
           GITHUB_TOKEN: ${{ github.token }}