Update Zend Server versions to latest releases

Add Tags for latest supported Zend Server version

Author: rainviigipuu

library/php-zendserver

@@ -1,6 +1,7 @@
 Maintainers: Heigo Sinilind <hsinilind@perforce.com> (@hsinilind),
              Rain Viigipuu <rviigipuu@perforce.com> (@rainviigipuu)
 GitRepo: https://github.com/zendtech/php-zendserver-docker.git
-GitCommit: bcd65b82acb4f3b5b67f8c657c52f08bc52d8789
+GitCommit: e4805272dd9a30adff7646f65cb5961c015afa27
 
-# https://github.com/docker-library/docs/pull/2475
+Tags: 2021, 2021.4.1, latest
+Directory: 2021