- generate_docset.py: use SHA-256 instead of SHA-1 for the cache file
name digest of downloaded images.
- generate_docset.py: suppress dynamic-urllib-use-detected; the URL
scheme is restricted to http(s) right before the call.
- generate_natvis.py: suppress direct-use-of-jinja2; the template
renders a local XML file with autoescape enabled.
Signed-off-by: Niels Lohmann <mail@nlohmann.me>