Fix Call buttons (tel: fallback) + replace MIT 95% stat with BCG 70%

Fix 1: Call buttons fell back to mailto: (tapping "Call" opened email) —
switch static fallback to tel:+17789856736. Display text unchanged.

Fix 2: Replace the contested MIT NANDA "95% of AI pilots fail" stat (known
methodology/COI problems) with BCG's durable 10/20/70 algorithms-tech-people
heuristic, source hyperlinked. Flows into the existing binder sentence.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

continuity-audit.html

@@ -176,7 +176,7 @@
       <p class="actions center">
         <a class="btn" href="https://cal.shopwisdom.ca/michaelvictory/20-min-shop-wise-meeting" data-cal-link="michaelvictory/20-min-shop-wise-meeting" data-cal-origin="https://cal.shopwisdom.ca" data-cal-config='{"theme":"light"}'>Book a fit call</a>
         <a class="btn link" href="mailto:michael@opencommunications.consulting?subject=Continuity%20Audit%20—%20Shop%20Wisdom">Email Michael</a>
-        <a class="btn link tel" data-p1="778" data-p2="985" data-p3="6736" href="mailto:michael@opencommunications.consulting">Call 778&#8209;985&#8209;OPEN (6736)</a>
+        <a class="btn link tel" data-p1="778" data-p2="985" data-p3="6736" href="tel:+17789856736">Call 778&#8209;985&#8209;OPEN (6736)</a>
       </p>
       <p class="promise">The first call is free and commits you to nothing.</p>
     </div>