Update redis Docker tag to v8

This MR contains the following updates:

Package	Update	Change
redis	major	7.2.4 -> 8.0.1
redis	major	7-alpine -> 8-alpine

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This MR has been generated by Renovate Bot.

mentioned in issue #40

restored source branch renovate/templates-redis-8.x

changed the description

added 10 commits

• 6bfe8d4d...cb907c40 - 9 commits from branch master
• 3a98a9e0 - Update redis Docker tag to v8

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changed the description

added 1 commit

• 78130dc4 - Update redis Docker tag to v8

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