doc: Fix path to Image I/O module page [ChangeLog]

Author: schuhschuh

Diff for: ChangeLog.txt

@@ -12,7 +12,7 @@ Release 1.0rc2 (Jan 13)
 
 - Refactored initialization of object factories, GNU g++ on Ubuntu excludes unused shared libraries
 - Use ``::`` as CMake target namespace separator
-- Moved image I/O classes to new :doc:`Image I/O </modules/imageio>` module.
+- Moved image I/O classes to new :doc:`Image I/O </modules/core/imageio>` module.
 - Build libLBFGS source files as part of Numerics module.
 - Build NIfTI C Library as part of Image I/O module.