Docs: Revision - Revise results contributing rule (#174)

**Description**
Revise results contributing rule.

- Change the results uploading path to [superbench-results](https://github.com/microsoft/superbench-results

) repo.
- Add description of how to get system info by command.
Co-authored-by: Peng Cheng <chengpeng5555@outlook.com>

docs/developer-guides/contributing.md

@@ -48,10 +48,10 @@ If you want to contribute benchmark results run by specified SuperBench version,
 
 #### Where to submit
 
-All the results are stored under `results` folder. The directory structure is as follows. Please create `<your-benchmark-folder>` to submit results.
+All the results are stored under [superbench-results](https://github.com/microsoft/superbench-results) repository. The directory structure is as follows. Please create `<your-benchmark-folder>` to submit results.
 
 ```
-└── results
+superbench-results
   ├── v0.2
   │   └── your-benchmark-foldername
   │       ├── LICENSE.md
@@ -84,5 +84,10 @@ All the results are stored under `results` folder. The directory structure is as
 
 Besides `README` and `LICENSE` file, you should provide at least three benchmarking related files.
 * `system.json`: This file lists all the system configurations in json format. 
+
+  You can get the system info automatically by executing `system_info.py` using below command. The file is under `superbench/tools` folder.
+  ```
+  python system_info.py
+  ```
 * `config.yaml`: This file is the config file to run benchmarks. Click [here](../getting-started/configuration) to learn the details.
 * `result.json`: This file contains the results run by SuperBench with system configuations listed in `system.json` file.
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