Fill in SDP 2026.1 GA Change History, fix a duplicate/typo'd rebranding bullet, and fix stale platform-support text in README.md.
ReleaseNotes.adoc: populated the real 'Jobs Fixed' list for SDP 2026.1
GA from JIRA (fixVersion=2026.1, closed issues only -- excluded SDP-1170
(deferred), SDP-1385 (the not-yet-executed Swarm retarget itself), and
SDP-1386 (stretch, not done)), 7 issues total. Also removed a duplicate
'What's New' bullet about rebranding (two near-identical bullets, one
with a 'brancing' typo).
README.md: 'Platform Support' section said 'The P4 SDP 2025.2 support the
folllowing operating systems' -- fixed to 2026.1 and the grammar/typo.
Agent: Claude Code, Model: Claude Sonnet 5 (claude-sonnet-5), operating as bot_Claude_Anthropic.