BUG - stop using Scrollspy #602

Job	Run time
a11y-tests (ubuntu-latest, 3.12)	3m 21s
build PST docs (ubuntu-latest, 3.12)	1m 21s
run-pytest (ubuntu-latest, 3.9)	2m 42s
build PST docs (macos-latest, 3.12)	2m 35s
run-pytest (ubuntu-latest, 3.10)	1m 44s
build PST docs (windows-latest, 3.12)	4m 6s
run-pytest (ubuntu-latest, 3.11)	2m 31s
build PST docs (ubuntu-latest, 3.9, 6.1)	1m 14s
run-pytest (ubuntu-latest, 3.12)	1m 40s
run-pytest (ubuntu-24.04, 3.11)	1m 34s
run-pytest (ubuntu-24.04, 3.12)	1m 44s
run-pytest (macos-14, 3.10)	2m 30s
run-pytest (macos-14, 3.11)	2m 22s
run-pytest (macos-14, 3.12)	2m 20s
run-pytest (windows-latest, 3.9)	2m 58s
run-pytest (windows-latest, 3.10)	2m 37s
run-pytest (windows-latest, 3.11)	2m 59s
run-pytest (windows-latest, 3.12)	3m 10s
run-pytest (ubuntu-latest, 3.9, 6.1)	1m 32s
run-pytest (ubuntu-latest, 3.12, dev)	2m 50s
Check coverage	50s
lighthouse-audit	4m 24s
profiling	27s
	53m 31s

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