add version 2.7.3 info on plugin.xml

Author: Philippe GODOT

projectbridge.xml

@@ -107,6 +107,11 @@
          <compatibility>~10.0.0</compatibility>
          <download_url>https://github.com/Probesys/glpi-plugins-projectbridge/releases/download/v2.7.2/projectbridge-2.7.2.tbz</download_url>
       </version>
+      <version>
+         <num>2.7.3</num>
+         <compatibility>~10.0.0</compatibility>
+         <download_url>https://github.com/Probesys/glpi-plugins-projectbridge/releases/download/v2.7.3/projectbridge-2.7.3.tbz</download_url>
+      </version>
    </versions>
    <langs>
       <lang>fr_FR</lang>