Fix vulnerable package.

System.Security.Cryptography.Xml -> v8.0.4

Author: barnson

src/internal/SetBuildNumber/Directory.Packages.props.pp

@@ -53,7 +53,7 @@
     <PackageVersion Include="System.DirectoryServices.AccountManagement" Version="8.0.0" />
     <PackageVersion Include="System.Management" Version="8.0.0" />
     <PackageVersion Include="System.Reflection.Metadata" Version="8.0.0" />
-    <PackageVersion Include="System.Security.Cryptography.Xml" Version="8.0.3" />
+    <PackageVersion Include="System.Security.Cryptography.Xml" Version="8.0.4" />
     <PackageVersion Include="System.Text.Encoding.CodePages" Version="8.0.0" />
     <PackageVersion Include="System.Text.Json" Version="8.0.6" />