Update Helm release external-dns to v1.15.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
external-dns	minor	1.14.5 -> 1.15.0

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Release Notes

kubernetes-sigs/external-dns (external-dns)

v1.15.0

Changed

• Updated ExternalDNS OCI image version to v0.15.0. (#xxxx) @​stevehipwell

Fixed

• Fixed provider.webhook.resources behavior to correctly leverage resource limits. (#​4560) @​crutonjohn
• Fixed provider.webhook.imagePullPolicy behavior to correctly leverage pull policy. (#​4643) @​kimsondrup
• Fixed to add correct webhook metric port to Service and ServiceMonitor. (#​4643) @​kimsondrup
• Fixed to no longer require the unauthenticated webhook provider port to be exposed for health probes. (#​4691) @​kimsondrup & @​hatrx

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