Update changelog and version to v3.16.4

Author: ptormene

svir/metadata.txt

@@ -13,7 +13,7 @@ name=OpenQuake Integrated Risk Modelling Toolkit
 qgisMinimumVersion=3.0
 description=Tools to drive the OpenQuake Engine, to develop composite indicators and integrate them with physical risk estimations, and to predict building recovery times following an earthquake
 about=This plugin allows users to drive OpenQuake Engine calculations (https://github.com/gem/oq-engine) of physical hazard and risk, and to load the corresponding outputs as QGIS layers. For those outputs, data visualization tools are provided. The toolkit also enables users to develop composite indicators to measure and quantify social characteristics, and combine them with estimates of human or infrastructure loss. The plugin can interact with the OpenQuake Platform (https://platform.openquake.org), to browse and download socio-economic data or existing projects, edit projects locally in QGIS and upload and share them with the scientific community. A post-earthquake recovery modeling framework is incorporated into the toolkit, to produce building level and/or community level recovery functions.
-version=3.16.3
+version=3.16.4
 author=GEM Foundation
 [email protected]
 
@@ -23,6 +23,8 @@ [email protected]
 
 # Uncomment the following line and add your changelog entries:
 changelog=
+    3.16.4
+    * When only one realization is extracted from the oq-engine, it is considered as the mean
     3.16.3
     * Following the migration to c++ of the processing algorithm qgis:joinbylocationsummary, the plugin uses the new version
       and applies styling separately instead of running it within a postprocessing phase of an inherited algorithm