spdx created specification expects

YYYY-MM-DDThh:mm:ssZ

as in the example:

Created: 2010-01-29T18:30:22Z

However, the current implementation does not produce time in the expected format.

Steps to reproduce

1. Take attached example or sbom from scratch example and modify

Line 41: created=datetime.datetime.now(tz=datetime.timezone.utc),
Line 75: release_date=datetime.datetime.now(tz=datetime.timezone.utc),

2. Build SBOM
3. Resulting SBOM has

   "created": "2023-09-29T08:14:36+00:00Z",

This does not match the spec and is also warned by: https://tools.spdx.org/app/

test_sbom.py.zip