Bump System.Text.Encodings.Web

Bumps [System.Text.Encodings.Web](https://github.com/dotnet/corefx) from 4.6.0 to 4.7.2.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

QuickDemo/6.Table_GridView/Table_GridView/packages.config

@@ -31,7 +31,7 @@
   <package id="System.Runtime.CompilerServices.Unsafe" version="4.6.0" targetFramework="net472" />
   <package id="System.Runtime.Extensions" version="4.1.0" targetFramework="net472" />
   <package id="System.Runtime.InteropServices" version="4.1.0" targetFramework="net472" />
-  <package id="System.Text.Encodings.Web" version="4.6.0" targetFramework="net472" />
+  <package id="System.Text.Encodings.Web" version="4.7.2" targetFramework="net472" />
   <package id="System.Text.Json" version="4.6.0" targetFramework="net472" />
   <package id="System.Threading" version="4.0.11" targetFramework="net472" />
   <package id="System.Threading.Tasks.Extensions" version="4.5.3" targetFramework="net472" />