Update README.md (#4281)

Use https

Author: akashhansda

README.md

@@ -73,7 +73,7 @@ The Swift package manager uses [llbuild](https://github.com/apple/swift-llbuild)
 If you have any trouble with the package manager, help is available. We recommend:
 
 * The [Swift Forums](https://forums.swift.org/c/development/swiftpm/),
-* Swift's [bug tracker](http://bugs.swift.org)
+* Swift's [bug tracker](https://bugs.swift.org)
 
 When reporting an issue please follow the bug reporting guidelines, they can be found in [contribution guide](./CONTRIBUTING.md#reporting-issues).