Update README.md (#188)

* Update README.md

unifying headers for contributing in swiftlang repo READMEs

* Update README.md

Co-authored-by: QuietMisdreavus <QuietMisdreavus@users.noreply.github.com>

---------

Co-authored-by: QuietMisdreavus <QuietMisdreavus@users.noreply.github.com>

Author: parispittman

README.md

@@ -44,7 +44,9 @@ print(document.debugDescription())
 Please see Swift `Markdown`'s [documentation site](https://apple.github.io/swift-markdown/documentation/markdown/)
 for more detailed information about the library.
 
-## Getting Involved
+## Contributing to Swift Markdown
+
+Please see the [contributing guide](https://swift.org/contributing/#contributing-code) for more information.
 
 ### Submitting a Bug Report
 
@@ -62,8 +64,6 @@ or start a discussion on the [Swift Forums](https://forums.swift.org/c/developme
 Don't hesitate to submit a feature request if you see a way
 Swift Markdown can be improved to better meet your needs.
 
-### Contributing to Swift Markdown
 
-Please see the [contributing guide](https://swift.org/contributing/#contributing-code) for more information.
 
 <!-- Copyright (c) 2021-2023 Apple Inc and the Swift Project authors. All Rights Reserved. -->