fix: repair split bullets in four chief-* Never lists, close utilisation lint gap

[VishnuVuggepalli]

Two shipped defects found while reading all 172 skills. Both have mechanical fixes; scripts/check-all.sh passes.

1. Four chief-* skills have a corrupted ## Never list

In each, a "Do not …" list was merged into a "Never …" list and the splice landed inside a wrapped bullet, orphaning its continuation onto an unrelated rule.

file	bullet ends mid-sentence	continuation landed at
security/chief-information-security-officer	:116 "…exist as documented,"	:120
corporate-strategy/chief-strategy-officer	:88 "…serves a thesis written"	:91
customer-experience/chief-customer-officer	:76 "…Count the contacts"	:79
data-analytics/chief-data-officer	:93 "…you will find out"	:97

The CISO file rendered as:

- Do not fix another team's finding for them and leave the cause in place
  which is a different question from whether they work.

Each split bullet is reunited, and the two voices are ordered consistently — Never-voiced items first, Do-not-voiced after. The CISO file also stated one rule twice (:117 and :121); the fuller wording is kept.

No wording is changed beyond rejoining sentences that were already there.

2. check-us-english.py missed utilisation

scripts/check-us-english.py:57 listed utilise/utilised/utilising but not the noun form — though every sibling entry carries its -ation form (organisation, prioritisation, optimisation, realisation, minimisation, maximisation).

Three British spellings were shipping in operations/capacity-and-demand-planning while CI reported clean. Red → green:

before:      US English: 0 British spelling(s)      ← 3 were shipping
with entry:  capacity-and-demand-planning:35  'Utilisation' -> 'Utilization'
             capacity-and-demand-planning:46  'utilisation' -> 'utilization'
             capacity-and-demand-planning:57  'utilisation' -> 'utilization'
             US English: 3 British spelling(s)   exit=1
after --fix: US English: 0 British spelling(s)   exit=0

The prose was corrected by the script's own --fix, so that wording is yours, not mine.

Verification

scripts/check-all.sh — all green: 172 skills valid, provenance clean, README / social card / org chart current, 273 skill references resolve, manifests parse.

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Seven further findings from the same read — including a docs/USE-CASES.md reference that ships in no plugin, and a description/body mismatch in partnership-marketing — are in a companion issue. Those are authorial calls rather than mechanical fixes, so I left them out of this PR.