chore: ignore @types/node updates in dependabot (#104)

Keep @types/node pinned to stay in sync with the Node version bundled in
VS Code 1.83, which is the minimum supported version. Upgrading
@types/node could require a newer VS Code release and break support for
users on older IDEs.

Author: skyrpex

.github/dependabot.yml

@@ -6,6 +6,7 @@ updates:
       interval: "weekly"
     ignore:
       - dependency-name: "@types/vscode"
+      - dependency-name: "@types/node"
     groups:
       dev-dependencies:
         dependency-type: "development"