Update bootstrap toolchain from 20231016.0 to 20240920.2 (#835)

Author: Steelskin

.github/workflows/swift-toolchain.yml

@@ -801,7 +801,7 @@ jobs:
           github-repo: thebrowsercompany/swift-build
           github-token: ${{ secrets.GITHUB_TOKEN }}
           release-asset-name: installer-amd64.exe
-          release-tag-name: '20231016.0'
+          release-tag-name: '20240920.2'
 
       - uses: nttld/setup-ndk@v1
         id: setup-ndk
@@ -1471,7 +1471,7 @@ jobs:
           github-repo: thebrowsercompany/swift-build
           github-token: ${{ secrets.GITHUB_TOKEN }}
           release-asset-name: installer-amd64.exe
-          release-tag-name: '20231016.0'
+          release-tag-name: '20240920.2'
 
       # NOTE(compnerd): we execute unconditionally as we use CMake from VSDevEnv
       - uses: compnerd/gha-setup-vsdevenv@main