Updated reference: nficano/pytube -> pytube/pytube

.github/ISSUE_TEMPLATE/bug_report.md

@@ -9,7 +9,7 @@ assignees: ''
 **Before creating an issue**
 
 Please confirm that you are on the latest version of pytube by installing from the source.
-You can do this by running `python -m pip install git+https://github.com/nficano/pytube`.
+You can do this by running `python -m pip install git+https://github.com/pytube/pytube`.
 Sometimes, the pypi library repository is not up to date, and your issue may have been fixed already!
 
 **Describe the bug**