Update tests/test_signing_fix.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: atomicturtle

tests/test_signing_fix.py

@@ -22,7 +22,7 @@ def setUp(self):
         # Generate a key
         input_data = self.gpg.gen_key_input(
             key_type="RSA",
-            key_length=1024,
+            key_length=2048,
             name_real="Test Key",
             name_email="test@example.com",
             no_protection=True