updated the environment collection script URL to the raw version on G…

…ithub to download the script instead of the webpage (pytorch#6927)

.github/ISSUE_TEMPLATE.md

@@ -15,12 +15,12 @@ Error messages and stack traces are also helpful.
 
 ## System Info
 Please copy and paste the output from our
-[environment collection script](https://github.com/pytorch/pytorch/tree/master/torch/utils/collect_env.py)
+[environment collection script](https://raw.githubusercontent.com/pytorch/pytorch/master/torch/utils/collect_env.py)
 (or fill out the checklist below manually).
 
 You can get the script and run it with:
 ```
-wget https://github.com/pytorch/pytorch/tree/master/torch/utils/collect_env.py
+wget https://raw.githubusercontent.com/pytorch/pytorch/master/torch/utils/collect_env.py
 # For security purposes, please check the contents of collect_env.py before running it.
 python collect_env.py
 ```