flake8: Ignore .venv directory

.venv is by convention a very common place for venvs and
is the default in some tools, for example like "Astral uv".
The third-party packages installed there should not be linted.

Change-Id: I3278d90c2fdfc8a34a2488e82d4df8e836111ce1
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/469941
Tested-by: Erik Elmeke <[email protected]>
Commit-Queue: Josip Sokcevic <[email protected]>
Reviewed-by: Mike Frysinger <[email protected]>
Reviewed-by: Josip Sokcevic <[email protected]>

Author: Erik Elmeke

.flake8

@@ -12,5 +12,6 @@ extend-ignore =
     # E731: do not assign a lambda expression, use a def
     E731,
 exclude =
+    .venv,
     venv,
     .tox,