BUG - stop using Scrollspy #603

Job	Run time
a11y-tests (ubuntu-latest, 3.12)	3m 40s
build PST docs (ubuntu-latest, 3.12)	1m 19s
run-pytest (ubuntu-latest, 3.9)	1m 39s
build PST docs (macos-latest, 3.12)	2m 7s
run-pytest (ubuntu-latest, 3.10)	1m 41s
build PST docs (windows-latest, 3.12)	3m 38s
run-pytest (ubuntu-latest, 3.11)	1m 28s
build PST docs (ubuntu-latest, 3.9, 6.1)	1m 18s
run-pytest (ubuntu-latest, 3.12)	1m 41s
run-pytest (ubuntu-24.04, 3.11)	1m 38s
run-pytest (ubuntu-24.04, 3.12)	1m 43s
run-pytest (macos-14, 3.10)	2m 17s
run-pytest (macos-14, 3.11)	2m 24s
run-pytest (macos-14, 3.12)	1m 58s
run-pytest (windows-latest, 3.9)	3m 11s
run-pytest (windows-latest, 3.10)	3m 47s
run-pytest (windows-latest, 3.11)	3m 56s
run-pytest (windows-latest, 3.12)	4m 1s
run-pytest (ubuntu-latest, 3.9, 6.1)	1m 33s
run-pytest (ubuntu-latest, 3.12, dev)	2m 1s
lighthouse-audit	4m 23s
Check coverage	37s
profiling	23s
	52m 23s

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