Merge pull request #4021 from SwiftPackageIndex/update-devcontainer

Update Swift vscode extension

Author: finestructure

.devcontainer/devcontainer.json

@@ -5,7 +5,7 @@
     "customizations": {
       "vscode": {
         "extensions": [
-          "sswg.swift-lang"
+          "swiftlang.swift-vscode"
         ],
         "settings": {
           "lldb.library": "/usr/lib/liblldb.so"