Bump UmbracoCms from 6.2.1 to 8.10.0 in /PPC 2010/usercontrols

Bumps [UmbracoCms](https://github.com/umbraco/umbraco-cms) from 6.2.1 to 8.10.0.
- [Release notes](https://github.com/umbraco/umbraco-cms/releases)
- [Commits](umbraco/Umbraco-CMS@release-6.2.1...release-8.10.0)

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

PPC 2010/usercontrols/packages.config

@@ -24,7 +24,7 @@
   <package id="Newtonsoft.Json" version="4.5.11" targetFramework="net40" />
   <package id="SharpZipLib" version="0.86.0" targetFramework="net40" />
   <package id="structuremap" version="2.6.3" />
-  <package id="UmbracoCms" version="6.2.1" targetFramework="net40" />
+  <package id="UmbracoCms" version="8.10.0" targetFramework="net40" />
   <package id="UmbracoCms.Core" version="6.2.1" targetFramework="net40" />
   <package id="xmlrpcnet" version="2.5.0" targetFramework="net40" />
 </packages>