chore(deps): update helm release keda to v2.15.0 (#2335)

Author: renovate[bot]

Diff for: charts/selenium-grid/Chart.yaml

@@ -7,7 +7,7 @@ appVersion: 4.23.0-20240727
 icon: https://github.com/SeleniumHQ/docker-selenium/raw/trunk/logo.png
 dependencies:
 - repository: https://kedacore.github.io/charts
-  version: 2.14.2
+  version: 2.15.0
   name: keda
   condition: autoscaling.enabled
 - repository: https://kubernetes.github.io/ingress-nginx