Update README.md (#78)

Co-authored-by: Mishal Shah <[email protected]>
Co-authored-by: QuietMisdreavus <[email protected]>

Author: 3 people

README.md

@@ -29,4 +29,26 @@ Add the dependency to any targets you've declared in your manifest:
 .target(name: "MyTarget", dependencies: ["SymbolKit"]),
 ```
 
-<!-- Copyright (c) 2021-2022 Apple Inc and the Swift Project authors. All Rights Reserved. -->
+
+## Contributing to SymbolKit
+
+Contributions to SymbolKit are welcomed and encouraged! Please see the
+[Contributing to Swift guide](https://swift.org/contributing/).
+
+Before submitting the pull request, please make sure you have [tested your
+changes](https://github.com/apple/swift/blob/main/docs/ContinuousIntegration.md)
+and that they follow the Swift project [guidelines for contributing
+code](https://swift.org/contributing/#contributing-code).
+
+To be a truly great community, [Swift.org](https://swift.org/) needs to welcome
+developers from all walks of life, with different backgrounds, and with a wide
+range of experience. A diverse and friendly community will have more great
+ideas, more unique perspectives, and produce more great code. We will work
+diligently to make the Swift community welcoming to everyone.
+
+To give clarity of what is expected of our members, Swift has adopted the
+code of conduct defined by the Contributor Covenant. This document is used
+across many open source communities, and we think it articulates our values
+well. For more, see the [Code of Conduct](https://swift.org/code-of-conduct/).
+
+<!-- Copyright (c) 2021-2024 Apple Inc and the Swift Project authors. All Rights Reserved. -->