Add notes for CLHEP 2.4.4.1

ChangeLog

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 19.01.21 Release CLHEP-2.4.4.1
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+
+12 January 2021 - Vassil Vassilev <v.g.vassilev@gmail.com>
+
+*  Rename modulemap name to avoid name clashes.
+
+08 January 2021 - G.Cosmo
+
+* Random: Renamed DoubConv.hh header coherently to DoubConv.h.
+
+18 November 2020 - Guilherme Amadio <amadio@cern.ch>
+
+* Random: Fix testThreaded on x86
+
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 09.11.20 Release CLHEP-2.4.4.0
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