Update docker.elastic.co/elasticsearch/elasticsearch Docker tag to v7.17.20

Author: renovate[bot]

.circleci/config.yml

@@ -30,7 +30,7 @@ jobs:
                   MYSQL_DATABASE: 'test'
                   MYSQL_USER: 'test'
                   MYSQL_PASSWORD: 'test'
-            - image: 'docker.elastic.co/elasticsearch/elasticsearch:7.17.0'
+            - image: 'docker.elastic.co/elasticsearch/elasticsearch:7.17.20'
               environment:
                   discovery.type: "single-node"
         steps:
@@ -58,7 +58,7 @@ jobs:
                   MYSQL_DATABASE: 'test'
                   MYSQL_USER: 'test'
                   MYSQL_PASSWORD: 'test'
-            - image: 'docker.elastic.co/elasticsearch/elasticsearch:7.17.0'
+            - image: 'docker.elastic.co/elasticsearch/elasticsearch:7.17.20'
               environment:
                   discovery.type: "single-node"
         steps:

docker-compose.yml

@@ -10,7 +10,7 @@ services:
       TZ: "Europe/Berlin"
 
   elasticsearch:
-    image: docker.elastic.co/elasticsearch/elasticsearch:7.17.0
+    image: docker.elastic.co/elasticsearch/elasticsearch:7.17.20
     environment:
       TZ: "Europe/Berlin"
       discovery.type: "single-node"