Update ELK images

elasticsearch:
- https://github.com/docker-library/elasticsearch/commit/d2a9208: Update to 7.4.2

logstash:
- https://github.com/docker-library/logstash/commit/08f0241: Update to 7.4.2

kibana:
- https://github.com/docker-library/kibana/commit/8533a0a: Update to 7.4.2

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: 7.4.1
-GitCommit: 5816ba1a6fe1545fb7e54c914fe1a3a9cfcfe977
+Tags: 7.4.2
+GitCommit: d2a9208235faa0165bd03dad612e897bdbcf09fc
 Directory: 7
 
 Tags: 6.8.4

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: 7.4.1
-GitCommit: b5c76d50bbeb4986e943e267edaaa4d75175e742
+Tags: 7.4.2
+GitCommit: 8533a0adbbcf829e6d069fa033339d9212fb986b
 Directory: 7
 
 Tags: 6.8.4

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: 7.4.1
-GitCommit: 338bfda95af35fc32d73b25d67480929c34636ab
+Tags: 7.4.2
+GitCommit: 08f0241e9b8f15a57a82f8d9283795f2ab71341f
 Directory: 7
 
 Tags: 6.8.4