Use new overlay version

ci.hocon

@@ -7,7 +7,7 @@ include "ci_common/common.hocon"
 
 # The standard set of gate builds. N.B. the style/builtin checks are only run on Linux as they are not OS-dependent.
 
-overlay = "82b7056d549b998878586415dc111954467c1e44"
+overlay = "6c3623c5f1394db280dca1243f88e61f806672f2"
 builds = [
   ${gateTestLinux}            {capabilities : [linux, amd64, fast],  targets : [gate], name: "gate-test-linux-amd64"}
   ${gateTestNoSpecialsLinux}  {capabilities : [linux, amd64, fast],  targets : [gate], name: "gate-test-linux-amd64-nospecials"}