scripts/docs/generate-md.sh: fix location of generate code

[thaJeztah]

relates to:

• docs: move doc generation scripts to subdir #3991
• rm: allow docker container remove as an alias #3986

scripts/docs/generate-md.sh: fix location of generate code

Commit 1e3622c (#3991) moved the generator code
to a subdirectory, but forgot to update the markdown version of this script.

docs: regenerate markdown docs

This adds the new aliases that were added in 9b54d86 (#3986)

- Description for the changelog

- A picture of a cute animal (not mandatory but encouraged)

[codecov-commenter]

Codecov Report

Merging #4169 (08a794d) into master (613ab8b) will increase coverage by 0.37%.
The diff coverage is n/a.

Additional details and impacted files

@@ Coverage Diff @@## master #4169 +/- ##
==========================================
+ Coverage 58.66% 59.03% +0.37% 
==========================================
Files 286 288 +2 Lines 24769 24776 +7 ==========================================
+ Hits 14531 14627 +96 + Misses 9355 9265 -90 - Partials 883 884 +1 

[thaJeztah]

@crazy-max@dvdksn ptal

[crazy-max]

We should also look at validation of markdown to avoid drifting in the future, see PR description in #3924 (comment)

In follow-up we should also validate docs like it's done in buildx: https://github.com/docker/buildx/blob/88852e2330a200d495342e01783a922a5328d55c/hack/dockerfiles/docs.Dockerfile#L30-L43

[thaJeztah]

Yes we should validate this as part of CI; I thought we already did, but indeed it was not yet done (also see #4166 (comment))

I created #4171 for tracking

Let me bring this one in 👍