Merge branch 'FindLibXml2' into release-3.14

Merge-request: !2970
diff --git a/Modules/FindLibXml2.cmake b/Modules/FindLibXml2.cmake
index 1a2af16..47c0e79 100644
--- a/Modules/FindLibXml2.cmake
+++ b/Modules/FindLibXml2.cmake
@@ -18,7 +18,7 @@
 
 This module will set the following variables in your project:
 
-``LIBXML2_FOUND``
+``LibXml2_FOUND``
   true if libxml2 headers and libraries were found
 ``LIBXML2_INCLUDE_DIR``
   the directory containing LibXml2 headers