Nest markdown section headings below the main heading

[liamhuber]

Regarding #500, but I don't want to use the github closing keywords because I'd like to see the docs gen and confirm that this fixes it first.

[review-notebook-app]

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[github-actions]

👈 Launch a binder notebook on branch pyiron/pyiron_workflow/quickstart_docs_toc

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.02% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (9e776ad)	3375	3089	91.53%
Head commit (a405a84)	3377 (+2)	3090 (+1)	91.50% (-0.02%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#511)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[coveralls]

Pull Request Test Coverage Report for Build 12017105298

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 91.501%

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Files with Coverage Reduction	New Missed Lines	%
mixin/run.py	1	93.64%

Totals
Change from base Build 12011677602:	-0.03%
Covered Lines:	3090
Relevant Lines:	3377

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💛 - Coveralls