add mi-issues-and-prs.md (fixes #3354)

[xyb994]

Important: Do not tick a checkbox if you haven’t performed its action.

Before Creating the Pull Request

• [x] Verify the changes are on a new branch other than master – it should say "compare: branch-name".
• [x] Start the pull request title with lowercase letters, e.g., add githubusername.md.
• [x] Add issue number to the end of the pull request title when applicable, e.g., update mi-faq.md (fixes #3264).

After Creating the Pull Request

• [x] Go to "Commits" tab, make sure the commit username is clickable and linked to your GitHub account correctly.
• [x] Review the "Files changed" tab to ensure there are no unnecessary files or changes included in the pull request.
• [x] Verify that the raw.githack preview link is included in the description.
  • [x] Preview the MDwiki rendered changes using the raw.githack link. Ensure it displays as expected without any errors.
• [ ] Drop a link to this pull request in our discord channel.

Description, Screenshots and/or Screencast

fixes #3354

Raw.Githack Preview Link

https://raw.githack.com/open-learning-exchange/open-learning-exchange.github.io/3354-update-mi-10-stepsmd/index.html#!pages/mi/mi-issues-and-prs.md https://raw.githack.com/open-learning-exchange/open-learning-exchange.github.io/3354-update-mi-10-stepsmd/index.html#!pages/mi/mi-10-steps.md#Step_8_-_Create_More_Issues_and_Pull_Requests