pre-upload: fix internal_failure setting

This is a named tuple, so we need to replace the value, not set it.

Bug: 299373007
Test: None
Change-Id: I86eb65c484878c11c2f02b6a0c6212943895f922

pre-upload.py

diff --git a/pre-upload.py b/pre-upload.py
index 3eece2d..18bf11f 100755
--- a/pre-upload.py
+++ b/pre-upload.py
@@ -359,8 +359,7 @@
         config = _get_project_config(from_git)
     except rh.config.ValidationError as e:
         output.error('Loading config files', str(e))
-        ret.internal_failure = True
-        return ret
+        return ret._replace(internal_failure=True)
 
     # If the repo has no pre-upload hooks enabled, then just return.
     hooks = list(config.callable_hooks())
@@ -374,8 +373,7 @@
     except rh.utils.CalledProcessError as e:
         output.error('Upstream remote/tracking branch lookup',
                      f'{e}\nDid you run repo start?  Is your HEAD detached?')
-        ret.internal_failure = True
-        return ret
+        return ret._replace(internal_failure=True)
 
     project = rh.Project(name=project_name, dir=proj_dir)
     rel_proj_dir = os.path.relpath(proj_dir, rh.git.find_repo_root())