fix: fix the new javadoc jobs

Author: zhongkechen

.github/workflows/build.yml

@@ -81,7 +81,7 @@ jobs:
           target-folder: coverage
 
       - name: Generate javadoc site
-        if: ${{ github.ref == 'refs/heads/main' && matrix.java == 17 }}
+        if: ${{ matrix.java == 17 }}
         run: mvn -B -pl sdk -am javadoc:javadoc
 
       - name: Configure GitHub Pages