chore: include aignas to PyPI code reviewers (#2034)

It seems that I am not added to PyPI reviewers. After rereading the
comment at the top of the file, it makes sense.

.github/CODEOWNERS

diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index a7ca2b0..6a8a48f 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -7,5 +7,5 @@
 /examples/build_file_generation/ @f0rmiga
 
 # PyPI integration related code
-/python/private/pypi/ @groodt
-/tests/pypi/ @groodt
+/python/private/pypi/ @aignas @groodt
+/tests/pypi/ @aignas @groodt