Update license expression to AGPL-3.0-only

The `<PackageLicenseExpression>` property in the `EasyExtensions.Crypto.csproj` file was updated from `AGPL-3.0` to `AGPL-3.0-only`. This change clarifies that the package is licensed under the "GNU Affero General Public License v3.0 only," explicitly excluding later versions for greater precision.

Author: bvdcode

Sources/EasyExtensions.Crypto/EasyExtensions.Crypto.csproj

@@ -22,7 +22,7 @@
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
 		<IncludeSymbols>true</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
-		<PackageLicenseExpression>AGPL-3.0</PackageLicenseExpression>
+		<PackageLicenseExpression>AGPL-3.0-only</PackageLicenseExpression>
 	</PropertyGroup>
 
 	<ItemGroup>