README: Add duplicate reminder about not PRing own solutions (TheOdinProject#599)

Duplicate for extra visibility, like in TheOdinProject/css-exercises#540

Author: eyad-alkhalidy

README.md

@@ -2,6 +2,9 @@
 
 These JavaScript exercises are intended to complement the JavaScript content on [The Odin Project](https://www.theodinproject.com/) (TOP). They should only be done when instructed during the course of the curriculum.
 
+> [!IMPORTANT]
+> We encourage you to practice your git skills by committing your changes and pushing them to your own fork.  However, please **DO NOT** open a Pull Request to have your solutions merged into this repo or to show your solution.  If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
+
 ## Contributing
 
 If you have a suggestion to improve an exercise, an idea for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our [contributing guide](https://github.com/TheOdinProject/javascript-exercises/blob/main/CONTRIBUTING.md).