chore(NA): update versions after v9.3.4 bump (elastic#262151)

This PR is a simple update of our versions file after the recent bumps.

Author: mistic

versions.json

@@ -7,7 +7,7 @@
       "branchType": "development"
     },
     {
-      "version": "9.3.3",
+      "version": "9.3.4",
       "branch": "9.3",
       "branchType": "release"
     },