Update dependency docker.elastic.co/elasticsearch/elasticsearch to v7.17.20

This MR contains the following updates:

Package	Type	Update	Change
docker.elastic.co/elasticsearch/elasticsearch	service-image	patch	7.17.13 -> 7.17.20
docker.elastic.co/elasticsearch/elasticsearch		patch	7.17.13 -> 7.17.20

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Release Notes

elastic/elasticsearch

v7.17.20

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.20.html

v7.17.19

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.19.html

v7.17.18

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.18.html

v7.17.17

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.17.html

v7.17.16

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.16.html

v7.17.15

Compare Source

Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.15.html

v7.17.14

Compare Source

Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.14.html

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