Fix Readme instruction (#2615)

Summary: Pull Request resolved: #2615

Reviewed By: msaroufim

Differential Revision: D74413662

Pulled By: ZainRizvi

fbshipit-source-id: 4a0ae33d07604a41c9149983f631f1abbfd4540e

Author: ZainRizvi

README.md

@@ -49,7 +49,7 @@ if you're interested in running torchbench as a library you can
 
 ```bash
 python3 install.py
-pip install git+https://www.github.com:pytorch/benchmark.git
+pip install git+https://www.github.com/pytorch/benchmark.git
 ```
 
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