chore(deps): update elasticsearch docker tag to v7.17.8

This MR contains the following updates:

Package	Update	Change
elasticsearch	minor	7.16.2 -> 7.17.8

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Release Notes

elastic/elasticsearch

v7.17.8

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.8.html

v7.17.7

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.7.html

v7.17.6

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.6.html

v7.17.5

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.5.html

v7.17.4

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.4.html

v7.17.3

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.3.html

v7.17.2

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.2.html

v7.17.1

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.1.html

v7.17.0

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.17/release-notes-7.17.0.html

v7.16.3

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Downloads: https://elastic.co/downloads/elasticsearch Release notes: https://www.elastic.co/guide/en/elasticsearch/reference/7.16/release-notes-7.16.3.html

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