Bump cortex-core chart appVersions to sha-d5e2b96 [skip ci]

Author: github-actions[bot]

helm/library/cortex-core/Chart.yaml

@@ -5,5 +5,5 @@ apiVersion: v2
 name: cortex-core
 description: A Helm chart deploying Cortex core services.
 type: application
-appVersion: "sha-6c869a7"
+appVersion: "sha-d5e2b96"
 version: 0.25.0