Added upstream command

[tanishagupta1]

Fixes #61

Short description of what this resolves:

What Changes proposed in this pull request:

• Added command to set upstream in the local repository in Readme.md

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added documentation so that the program is self-explanatory and educational.
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes:

[tanishagupta1]

May you please add this pull request under hacktoberfest if find relevant. Thank You, Do let me know about any other required changes

[Utkarsh1504]

Thank you!

[Utkarsh1504]

@tanishagupta1 why you pushed these commits in this PR, please undo these changes which you have made later, and please make a new PR then push those commits.
I will suggest to you make a new branch otherwise you may face merging conflicts issues, I have given step by step instructions on how to use version control, please follow that.

[tanishagupta1]

Yes I completely got the point sorry for the inconvenience, I'll fix it

[tanishagupta1]

Can you pls guide me as to if I should fetch and merge with the upstream branch and again make the commit or as I reverted the commit, it doesn't seem to resolve the issue

[Utkarsh1504]

Ok, you just have reverted both the commits:

1. Add upstream command and
2. Add code in java

Now just make a commit for the adding upstream command again and That's it.

[tanishagupta1]

reverted to added upstream commit hope the issue is resolved now

[Utkarsh1504]

@tanishagupta1 yes you did it! Thank you!

[tanishagupta1]

Thank you for the help!

[Utkarsh1504]

Now In the future contribution please make a new branch and then contribute in that only, don't do contribution in the main branch.

[tanishagupta1]

yes definitely! taking the learnings with me.