Update updates/2024-09-steering-council-update.md

heh, it's not longer an acronym for Acorn Risc Machines?

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: gpshead

updates/2024-09-steering-council-update.md

@@ -131,7 +131,7 @@ Core Developer Promotion:
 
 Core Developer Sprint 2025:
 
-- Considering ARM's proposal to host in Cambridge, UK
+- Considering Arm's proposal to host in Cambridge, UK
 - Pablo to discuss expectations and needs with Diego
 - Visa considerations to be clarified with ARM and PSF
 - Six months advance notice required for invitees