Update current version to 7.28.0.Final (#1591)

Signed-off-by: Francisco Javier Tirado Sarti <ftirados@ibm.com>

Author: fjtirado

.github/project.yml

@@ -1,4 +1,4 @@
 release:
-  current-version: 7.27.0.Final
+  current-version: 7.28.0.Final
   next-version: 8.0.0-SNAPSHOT