Update ELK images

elasticsearch:
- https://github.com/docker-library/elasticsearch/commit/d57b695: Update to 7.4.0

logstash:
- https://github.com/docker-library/logstash/commit/3f6d4dd: Update to 7.4.0

kibana:
- https://github.com/docker-library/kibana/commit/c2adec8: Update to 7.4.0

library/elasticsearch

@@ -4,8 +4,8 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/elasticsearch.git
 
-Tags: 7.3.2
-GitCommit: d8244424114ad7e68fe74fa4822580c756ea6180
+Tags: 7.4.0
+GitCommit: d57b695dde58c23e2f20fc6daf711580db07b2fe
 Directory: 7
 
 Tags: 6.8.3

library/kibana

@@ -4,8 +4,8 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/kibana.git
 
-Tags: 7.3.2
-GitCommit: dd8f0a5007fbbc7009a6598c313e4ea8af38b98a
+Tags: 7.4.0
+GitCommit: c2adec80068e184472f6b61f7bee2895a80cfb26
 Directory: 7
 
 Tags: 6.8.3

library/logstash

@@ -4,8 +4,8 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/logstash.git
 
-Tags: 7.3.2
-GitCommit: 7ad2c52468525c679e6207deded1bd4150b6cbf1
+Tags: 7.4.0
+GitCommit: 3f6d4dd6f59c7c627aeb2908009935d66b46b3f0
 Directory: 7
 
 Tags: 6.8.3