feat: Update docs - Arbitrator 1.2.0 (#306)

Co-authored-by: Tomer Pasman <t.pasman@f5.com>

Author: pasmant

Diff for: content/nap-dos/releases/about-1.2.0.md

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+---
+title: NGINX App Protect DoS Arbitrator 1.2.0
+toc: true
+weight: 61
+docs: DOCS-000
+---
+
+Here you can find the release information for F5 NGINX App Protect DoS Arbitrator v1.2.0
+
+## Arbitrator Service Release 1.2.0
+
+Mar 24, 2025
+
+### Enhanced Sync Mechanism in ADMD Based on Arbitrator Version
+In this release, ADMD now dynamically selects the appropriate synchronization method based on the Arbitrator's version:
+Arbitrator 1.2.0 and above – ADMD uses Batch Sync, allowing all VSs to be synchronized in a single request, improving efficiency and reducing overhead.
+Arbitrator versions below 1.2.0 – ADMD continues to use per-VS Sync, ensuring compatibility with earlier versions.
+This enhancement optimizes synchronization performance while maintaining backward compatibility.