rel(1.2.7): Update CHANGES [skip ci]

Author: oesteban

CHANGES.rst

@@ -2,7 +2,8 @@
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 Bug-fix release in the 1.2.x series with a very minor improvement of the reportlets.
 
-  * FIX: Use ``numpy.linspace`` to calculate mosaic plots' cutting planes (#543)
+* FIX: Pin PyBIDS < 0.11 (and TemplateFlow < 0.6.3) only on the 1.2.x series. (#552)
+* FIX: Use ``numpy.linspace`` to calculate mosaic plots' cutting planes (#543)
 
 1.2.6 (June 09, 2020)
 =====================