python3: update CVE product

python3: update CVE product

There are two "new" CVEs reported for python3, their CPEs are:
* CVE-2020-1171: cpe:2.3:a:microsoft:python:*:*:*:*:*:visual_studio_code:*:* (< 2020.5.0)
* CVE-2020-1192: cpe:2.3:a:microsoft:python:*:*:*:*:*:visual_studio_code:*:* (< 2020.5.0)
These are for "Visual Studio Code Python extension".

Solve this by addding CVE vendor to python CVE product to avoid
confusion with Microsoft as vendor.

Examining CVE DB for historical python entries shows:
sqlite> select vendor, product, count(*) from products where product = 'python' or product = 'cpython'
   ...> or product like 'python%3' group by vendor, product;
microsoft|python|2
python|python|1054
python_software_foundation|python|2

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>