Document GitHub serverside limit on URL length

[gukoff]

example of a long URL

Why:

Closes #5136

What's being changed:

Add a note about the URL length limit.

Check off the following:

• I have reviewed my changes in staging. (look for the deploy-to-heroku link in your pull request, then click View deployment)
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[janiceilene]

Thanks for opening a PR 👍 Please fill out the pull request template in the top comment in this pull request, then we'll get this up for review!

[github-actions]

A stale label has been added to this pull request because it has been open 7 days with no activity. To keep this PR open, add a comment or push a commit within 3 days.

[Abhishek577270]

I got gold money cash

[gukoff]

Thanks for opening a PR 👍 Please fill out the pull request template in the top comment in this pull request, then we'll get this up for review!

OK, will do

[github-actions]

A stale label has been added to this pull request because it has been open 7 days with no activity. To keep this PR open, add a comment or push a commit within 3 days.

[Abhishek577270]

My love

[gukoff]

Duplicated info from here to #5136
Added here a link to this new issue.
Don't see what else to change in the template, it's a very small change.

[janiceilene]

Thanks for filling out the PR template and opening an issue @gukoff! I'll get this up for review ⚡ Can you clarify how you know the serverside limit is 8191 bytes URL?

[gukoff]

Can you clarify how you know the serverside limit is 8191 bytes URL?

Sure, see the link "example of a long URL" in the description.

[lee-dohm]

Looks good!

[github-actions]

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