[skip ci] Update CHANGES - Version 1.2.6.post1

Hotfix release of version 1.2.6, pinning niworkflows to a release version (instead
of the development branch, since #1459) and including to bugfixes.

* [PIN] NiWorkflows 0.5.2.post7 (`1bf4a21 <https://github.com/poldracklab/fmriprep/commit/1bf4a21cce62c4330510a9a8ae50db876fbc23b0>`__).
* [FIX] Bad ``fsnative`` replacement in CIfTI workflow (#1476) @oesteban
* [FIX] Avoid warning when generating boilerplate (#1464) @oesteban

Author: oesteban

CHANGES.rst

@@ -1,10 +1,12 @@
 1.2.6-1 (January 24, 2019)
 ==========================
 
-Hotfix release of the 1.2.6 addressing the ``UnboundLocalError``, which should be
-fixed in niworkflows-0.5.4.
+Hotfix release of version 1.2.6, pinning niworkflows to a release version (instead
+of the development branch, since #1459) and including to bugfixes.
 
-* [PIN] NiWorkflows 0.5.4
+* [PIN] NiWorkflows 0.5.2.post7 (`1bf4a21 <https://github.com/poldracklab/fmriprep/commit/1bf4a21cce62c4330510a9a8ae50db876fbc23b0>`__).
+* [FIX] Bad ``fsnative`` replacement in CIfTI workflow (#1476) @oesteban
+* [FIX] Avoid warning when generating boilerplate (#1464) @oesteban
 
 
 1.2.6 (January 17, 2019)