[Solr Wiki] Update of "ReleaseNote72" by SteveRowe

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The "ReleaseNote72" page has been changed by SteveRowe:
https://wiki.apache.org/solr/ReleaseNote72?action=diff&rev1=1&rev2=2

- = 19 December 2017, Apache Solr™ 7.2.0 available =
+ = 21 December 2017, Apache Solr™ 7.2.0 available =
  
  The Lucene PMC is pleased to announce the release of Apache Solr 7.2.0
  
@@ -15, +15 @@

  See http://lucene.apache.org/solr/7_2_0/changes/Changes.html for a full list of details.
  
  == Solr 7.2.0 Release Highlights: ==
+  * Bi-directional syncing of CDCR clusters is now supported.
-  * The new synonymQueryStyle option allows for better scoring when terms at the same position are hyponyms/hypernyms rather than synonyms.
+  * The new synonymQueryStyle field type option allows for better scoring when terms at the same position are hyponyms/hypernyms rather than synonyms.
-  * More stream evaluators: local regression, matrix operations, scaling, correlation, markov chains.
- 
+  * More stream evaluators, including: matrix operations; spline; derivative; regression; normalization; scaling; correlation; markov chains; time series differencing; and triangular and geometric distributions.
+  * The new facet.matches parameter returns facet buckets only for terms that match a regular expression.
+  * New Autoscaling features: the autoscaling/suggestions API end-point; the UTILIZENODE command, which moves replicas according to autoscaling policies and preferences; and the Autoscaling set-property command.
  
  You are encouraged to thoroughly read the "Upgrade Notes" at http://lucene.apache.org/solr/7_2_0/changes/Changes.html or in the
  CHANGES.txt file accompanying the release.