Stop committing changes in pot creation date

[rffontenelle]

python-docs-tx-translations/.github/workflows/ci.yml

Line 198 in e751c2c

git diff -I'^"POT-Creation-Date: ' --numstat **/*.po **/*.pot | cut -f3 | xargs -r git add

This should avoid committing changes exclusively in POT-Creation-Date.

However, pot files are being committed even with just this change. See e.g. this commit

[rffontenelle]

When files are deleted in the POT generating step, this could be causing git diff to show more than just POT-Creation-Date changes, which would cause all pot to be git added.