Change community health file names to the same name format (#7192)

* Rename LICENSE to LICENSE.md

* Rename community.md to COMMUNITY.md

* Rename contributing.md to CONTRIBUTING.md

* Rename LICENSE.md to LICENSE

* Update README.md

* Update SUPPORT.md

README.md

@@ -221,7 +221,7 @@ Please read the [developer docs](/doc/devdocs) for a detailed breakdown.
 
 This project welcomes contributions of all types. Help spec'ing, design, documentation, finding bugs are ways everyone can help on top of coding features / bug fixes. We are excited to work with the power user community to build a set of tools for helping you get the most out of Windows.
 
-We ask that **before you start work on a feature that you would like to contribute**, please read our [Contributor's Guide](contributing.md). We will be happy to work with you to figure out the best approach, provide guidance and mentorship throughout feature development, and help avoid any wasted or duplicate effort.
+We ask that **before you start work on a feature that you would like to contribute**, please read our [Contributor's Guide](CONTRIBUTING.md). We will be happy to work with you to figure out the best approach, provide guidance and mentorship throughout feature development, and help avoid any wasted or duplicate effort.
 
 ### ⚠ State of code ⚠
 

SUPPORT.md

@@ -15,4 +15,4 @@ Support for PowerToys is limited to the resources listed above.
 [gh-bug]: https://github.com/microsoft/PowerToys/issues/new?assignees=&labels=Issue-Bug&template=bug_report.md&title=
 [gh-feature]: https://github.com/microsoft/PowerToys/issues/new?assignees=&labels=&template=feature_request.md&title=
 [wiki]: https://github.com/microsoft/PowerToys/wiki
-[contributor]: https://github.com/microsoft/PowerToys/blob/master/contributing.md
+[contributor]: https://github.com/microsoft/PowerToys/blob/master/CONTRIBUTING.md