Many external urls in the doc or scripts use HTTP, when HTTPS works

[hajdbo]

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• I have checked the superset logs for python stacktraces and included it here as text if there are any.
• I have reproduced the issue with at least the latest released version of superset.
• I have checked the issue tracker for the same issue and I haven't found one similar.

Superset version

current

Expected results

HTTPS links should be used whenever possible.

Actual results

Many HTTP links in the doc and in some scripts.

Steps to reproduce

External links are present throughout the doc and some scripts.

Fixed by #7040

[hajdbo]

fixed by #7040

[hajdbo]

merged today