Update README.md (#8988)

Missing `autoconf` installation instruction added

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

benchmark/inference/README.md

@@ -7,6 +7,10 @@
    ```bash
    pip install ogb
    ```
+1. Install `autoconf` required for `jemalloc` setup
+   ```bash
+   sudo apt-get install autoconf
+   ```
 1. Install `jemalloc` for performance benchmark:
    ```bash
    cd ${workspace}