Update Docker image for Silverpeas version 6.4.2

Author: silveruser

library/silverpeas

@@ -2,8 +2,8 @@
 Maintainers: Miguel Moquillon <[email protected]> (@mmoqui)
 GitRepo: https://github.com/Silverpeas/docker-silverpeas-prod.git
 
-Tags: 6.4.1, latest
-GitCommit: 10abc2b0ea09cceedb65cf58a2cf843992d88a27
+Tags: 6.4.2, latest
+GitCommit: c80ded6919cdf9e1d3e50f2dcef80e32b497fbc1
 GitFetch: refs/heads/6.4.x
 
 Tags: 6.3.5