chore: bump version to 2.6.1

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: rbenzing

LibEmiddle/LibEmiddle.csproj

@@ -12,7 +12,7 @@
 
 		<!-- NuGet package metadata -->
 		<PackageId>LibEmiddle</PackageId>
-		<Version>2.6.0</Version>
+		<Version>2.6.1</Version>
 		<Authors>Russell Benzing</Authors>
 		<Company>Russell Benzing Inc</Company>
 		<Description>A comprehensive end-to-end encryption library implementing Double Ratchet and X3DH protocols for secure messaging.</Description>