chore(deps): update quay.io/brancz/kube-rbac-proxy docker tag to v0.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
quay.io/brancz/kube-rbac-proxy	minor	v0.14.2 -> v0.15.0

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Pull Request Test Coverage Report for Build 6587047911

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 0.0%

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Totals
Change from base Build 6505299978:	0.0%
Covered Lines:	0
Relevant Lines:	365

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💛 - Coveralls