Update setting-up-your-development-environment-to-create-a-github-app.md

[macedogm]

Why:

Fix two small typos in the documentation.

What's being changed:

1. You'll won't -> You won't
2. I'm getting seeing -> I'm getting

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• 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]

@macedogm Thanks so much for opening a PR! I'll get this triaged for review ✨

[github-actions]

This PR is stale because it has been open 7 days with no activity and will be automatically closed in 3 days. To keep this PR open, update the PR by adding a comment or pushing a commit.

[janiceilene]

This is not stale! @macedogm Thank you for your patience as our small team works through the amazing contributions ✨

[github-actions]

This PR is stale because it has been open 7 days with no activity and will be automatically closed in 3 days. To keep this PR open, update the PR by adding a comment or pushing a commit.

[shati-patel]

Oops 😄 Thank you for the fix, @macedogm! We really appreciate all the community contributions to help us improve our docs 🎉

I'll get this merged shortly!

[github-actions]

Thanks very much for contributing! Your pull request has been merged 🎉 You should see your changes appear on the site in approximately 24 hours.

[macedogm]

Oops 😄 Thank you for the fix, @macedogm! We really appreciate all the community contributions to help us improve our docs 🎉

I'll get this merged shortly!

Thanks for reviewing and merging @shati-patel !