Update renovate/renovate Docker tag to v36.1.15

This MR contains the following updates:

Package	Type	Update	Change
renovate/renovate	image	patch	36.1.11 -> 36.1.15

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Release Notes

renovatebot/renovate (renovate/renovate)

v36.1.15

Compare Source

Bug Fixes

• rubygems: Don't throw on metadata errors (#​23224) (369d927)

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