After rename update backlinks inside document tree calls

Steps to reproduce:

• Create a space hierarchy like Test1 > Test2 > Test3 > Test4
• Use a document tree call inside a page:

  {{documentTree root="document:xwiki:Test1.Test2.Test3.Test4.WebHome" showRoot="false"/}}
  

•  Rename one of the nodes like Test3 to Test3-renamed

Result:

• The document tree stops working after the rename because it still displays the old reference

Expected result

• The document tree is updated with the new renamed reference

  {{documentTree root="document:xwiki:Test1.Test2.Test3-renamed.Test4.WebHome" showRoot="false"/}}