Switch to @vscode/dts. (#12901)

Author: sean-mcmanus

Diff for: Extension/package.json

@@ -6511,7 +6511,7 @@
         "translations-generate": "set NODE_OPTIONS=--no-experimental-fetch && gulp translations-generate",
         "translations-import": "gulp translations-import",
         "import-edge-strings": "ts-node -T ./.scripts/import_edge_strings.ts",
-        "prep:dts": "yarn verify dts --quiet || (npx vscode-dts dev && npx vscode-dts main)",
+        "prep:dts": "yarn verify dts --quiet || (npx @vscode/dts dev && npx @vscode/dts main)",
         "build": "yarn prep:dts && echo [Building TypeScript code] && tsc --build tsconfig.json"
     },
     "devDependencies": {