docs: updates to fix broken links (#315)

* updating broken links

* fix: term guestbook

---------

Co-authored-by: Ayu Adiati <45172775+adiati98@users.noreply.github.com>

README.md

@@ -9,15 +9,15 @@
 
 # OpenSauced Guestbook
 
-This guestbook is a place for people who have taken [OpenSauced](https://app.opensauced.pizza/)'s [Intro to Open Source course](https://intro.opensauced.pizza/#/) to take their first steps into contributing to open source.
+This guestbook is a place for people who have taken [OpenSauced](https://app.opensauced.pizza/)'s [Intro to Open Source course](https://intro.opensauced.pizza/#/intro-to-oss/README) to take their first steps into contributing to open source.
 
 ## Getting Started
 
-For complete instructions on how to add yourself to our guest book, please head to the "[Let's Get Practical](https://intro.opensauced.pizza/#/05-how-to-contribute-to-open-source?id=let39s-get-practical)" section in our Intro to Open Source course.
+For complete instructions on how to add yourself to our guestbook, please head to the "[Let's Get Practical](https://intro.opensauced.pizza/#/intro-to-oss/how-to-contribute-to-open-source?id=let39s-get-practical)" section in our Intro to Open Source course.
 
 ## Resolving Merge Conflicts
 
-If you encounter merge conflicts while contributing to this repository, read our Intro to Open Source course's "[Merge Conflicts in the Guestbook Repository](https://intro.opensauced.pizza/#/05-how-to-contribute-to-open-source?id=merge-conflicts-in-the-guestbook-repository)" section.
+If you encounter merge conflicts while contributing to this repository, read our Intro to Open Source course's "[Merge Conflicts in the Guestbook Repository](https://intro.opensauced.pizza/#/intro-to-oss/how-to-contribute-to-open-source?id=merge-conflicts-in-the-guestbook-repository)" section.
 
 ## What's Next?
 
@@ -29,7 +29,7 @@ Hungry for more contributions? Check out our [pizza-verse](https://github.com/op
 
 All contributors are required to abide by our [Code of Conduct](https://github.com/open-sauced/.github/blob/main/CODE_OF_CONDUCT.md). Please follow our [Contributing Guidelines](CONTRIBUTING.md) for contributing.
 
-- **Course improvement**: If you are interested in improving OpenSauced's Intro to Open Source course, please create an issue at our [intro repository](https://github.com/open-sauced/intro) and refer to the [Contributing Guidelines](https://github.com/open-sauced/intro/blob/main/CONTRIBUTING.md).
+- **Course improvement**: If you are interested in improving OpenSauced's Intro to Open Source course, please create an issue at our [intro repository](https://github.com/open-sauced/intro) and refer to the [Contributing Guidelines](https://github.com/open-sauced/intro/blob/main/docs/CONTRIBUTING.md).
 
 - **Translations**: If you want to translate the [README](README.md) and other necessary parts of this repo, check out our [Translations Guidelines](i18n-guidelines.md).