Update renovate/renovate Docker tag to v36.78.3

This MR contains the following updates:

Package	Type	Update	Change
renovate/renovate	image	minor	36.74.2 -> 36.78.3

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Release Notes

renovatebot/renovate (renovate/renovate)

v36.78.3

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Build System

• deps: update dependency @​renovatebot/ruby-semver to v3.0.13 (#​24195) (e5c9cac)

v36.77.0

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Features

• datasource/docker: use schema and support annotations (#​23758) (2b24509)

Build System

• deps: update dependency @​renovatebot/ruby-semver to v3.0.12 (#​24174) (d468808)

v36.76.0

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Features

• changelog: support gitea changelogs (#​24144) (d3da0bc)

v36.74.3

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Tests

• ensure presence of CustomMigrationClasses in customMigrations (#​24171) (cfd680d)

Build System

• deps: update dependency @​renovatebot/pep440 to v3.0.6 (#​24173) (7bc1f61)

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