Update CI triggers in CONTRIBUTING.md (#8187)

Co-authored-by: Paul LeMarquand <[email protected]>

Author: shahmishal

CONTRIBUTING.md

@@ -336,19 +336,14 @@ license](https://swift.org/LICENSE.txt).
 
 SwiftPM uses [swift-ci](https://ci.swift.org) infrastructure for its continuous integration testing. The bots can be triggered on pull-requests if you have commit access. Otherwise, ask one of the code owners to trigger them for you.
 
-To run smoke test suite with the trunk compiler and other projects use:
-
-```
-@swift-ci please smoke test
-```
 
 This is **required** before a pull-request can be merged.
 
 
 To run just the self-hosted test suite (faster turnaround times so it can be used to get quick feedback) use:
 
 ```
-@swift-ci please smoke test self hosted
+@swift-ci please test self hosted
 ```
 
 
@@ -358,13 +353,21 @@ To run the swift toolchain test suite including SwiftPM use:
 @swift-ci please test
 ```
 
+To run the swift toolchain test suite against a specific platform use one of the following:
+
+```
+@swift-ci please test macos
+@swift-ci please test linux
+@swift-ci please test windows
+```
 
 To run package compatibility test suite (validates we do not break 3rd party packages) use:
 
 ```
 @swift-ci please test package compatibility
 ```
 
+
 ## Generating Documentation
 
 SwiftPM uses [DocC](https://github.com/apple/swift-docc) to generate some of its documentation (currently only the `PackageDescription` module). Documentation can be built using Xcode's GUI (Product → Build Documentation or `⌃⇧⌘D`) or manually: