run external for npm install latest

Author: rmorshea

noxfile.py

@@ -57,7 +57,7 @@ def apply_standard_pip_upgrades(session: Session) -> None:
 def install_latest_npm_in_ci(session: Session) -> None:
     if os.environ.get("CI") in TRUE_VALUES:
         session.log("Running in CI environment")
-        session.run("npm", "install", "-g", "npm@latest")
+        session.run("npm", "install", "-g", "npm@latest", external=True)
 
 
 @nox.session(reuse_venv=True)