Add .vscode directory to brave license helper prune list

These directories cause local build errors if they exist by opening the parent directory with VS Code

script/brave_license_helper.py

@@ -123,6 +123,7 @@ def AddBraveCredits(prune_paths, special_cases, prune_dirs, additional_paths):
     prune_list += [
         'chromium_src',  # Brave's overrides, covered by main notice.
         'node_modules',  # See brave/third_party/npm-* instead.
+        '.vscode',       # Automatically added by Visual Studio.
     ]
     prune_dirs = tuple(prune_list)