fix: update copyright year to 2026

- Modified the Copyright year in the PollinationSDK.csproj file from 2025 to 2026

Author: MingboPeng

src/CSharpSDK/PollinationSDK.csproj

@@ -7,7 +7,7 @@
 		<Version>1.1.0.0-dev</Version>
 		<Authors>Ladybug Tools</Authors>
 		<Description>This is the .Net version of PollinationSDK</Description>
-		<Copyright>Copyright © 2025 Ladybug Tools LLC</Copyright>
+		<Copyright>Copyright © 2026 Ladybug Tools LLC</Copyright>
 		<PackageLicenseExpression>MIT</PackageLicenseExpression>
 		<PackageProjectUrl>https://github.com/pollination/csharp-sdk</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/pollination/csharp-sdk</RepositoryUrl>