Extract html-data; consider x86_64 when loading Java lib; use B2 action

.github/workflows/bench.yaml

@@ -55,10 +55,8 @@ jobs:
           npm install
           ./build.sh
 
-      - name: Install B2 CLI
-        run: |
-          sudo pip install setuptools
-          sudo pip install --upgrade b2
+      - name: Set up Backblaze B2 CLI
+        uses: wilsonzlin/setup-b2@v3
 
       - name: Run bench and upload results
         working-directory: ./bench