Silence external message

Author: BrianMichell

noxfile.py

@@ -125,9 +125,9 @@ def coverage(session: Session) -> None:
     session.run("uv", "pip", "install", "coverage[toml]", external=True)
 
     if not session.posargs and any(Path().glob(".coverage.*")):
-        session.run("coverage", "combine")
+        session.run("coverage", "combine", external=True)
 
-    session.run("coverage", *args)
+    session.run("coverage", *args, external=True)
 
 
 @session(python=python_versions[0])