Bump NLog from 4.7.0 to 4.7.2 in /src/NLog.Web (#565)

Bumps [NLog](https://github.com/NLog/NLog) from 4.7.0 to 4.7.2.
- [Release notes](https://github.com/NLog/NLog/releases)
- [Changelog](https://github.com/NLog/NLog/blob/dev/CHANGELOG.md)
- [Commits](NLog/NLog@v4.7...v4.7.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

src/NLog.Web/NLog.Web.csproj

@@ -38,7 +38,7 @@ For ASP.NET Core: Check https://www.nuget.org/packages/NLog.Web.AspNetCore
     <DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="NLog" Version="4.7.0" />
+    <PackageReference Include="NLog" Version="4.7.2" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="System.Web" />