webhosting-operator: Update quay.io/brancz/kube-rbac-proxy Docker tag to v0.15.0

[renovate]

This PR contains the following updates:

Package	Update	Change
quay.io/brancz/kube-rbac-proxy	minor	v0.14.0 -> v0.15.0
quay.io/brancz/kube-rbac-proxy	minor	v0.14.2 -> v0.15.0

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Release Notes

brancz/kube-rbac-proxy (quay.io/brancz/kube-rbac-proxy)

v0.15.0: 0.15.0/2023-10-20

Compare Source

• [ENHANCEMENT] bump opentelemetry to fix CVE
• [ENHANCEMENT] add option to disable HTTP/2:
  • --http2-disable (default: false)
• [ENHANCEMENT] add option to fine-tune HTTP/2:
  • --http2-max-size (default: 256kb)
  • --http2-max-concurrent-streams (default: 100)

v0.14.4: 0.14.4/2023-10-16

Compare Source

• [ENHANCEMENT] bump golang and x/net

v0.14.3: 0.14.3/2023-09-15

Compare Source

• [BUGFIX] --version returns now the proper kube-rbac-proxy version
• ENHANCEMENT] bump dependencies

v0.14.2: 0.14.2/2023-06-05

Compare Source

• [ENHANCEMENT] bump dependencies
• [ENHANCEMENT] Makefile, Dockerfile to work better with different architectures

v0.14.1: 0.14.1/2023-04-06

Compare Source

• [ENHANCEMENT] bump dependencies

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