chore(deps): update all non-major keycloak

| datasource | package                                   | from                | to                  |
| ---------- | ----------------------------------------- | ------------------- | ------------------- |
| docker     | quay.io/keycloak/keycloak                 | 26.5.7              | 26.6.0              |
| docker     | registry.camunda.cloud/vendor-ee/keycloak | 26.5.7-debian-12-r0 | 26.6.0-debian-12-r0 |

Author: renovate[bot]

keycloak-26/bases.yml

@@ -16,7 +16,7 @@ sources:
         # skopeo --override-os linux inspect docker://registry.camunda.cloud/vendor-ee/keycloak:<tag> --raw | jq '.Digest'
         image:
             repository: registry.camunda.cloud/vendor-ee/keycloak
-            tag: 26.5.7-debian-12-r0@sha256:350c7c7ee4ef8cafa5cd0b973d15237f62ed4193ee4ec9c3570265583c5f67fa
+            tag: 26.6.0-debian-12-r0@sha256:eb5b4fe7b1ae306322c75e4a72229bb8067f8b1cb48454225af27fc2a684fe60
 
     quay:
         # List of all available images with associated sha:
@@ -25,4 +25,4 @@ sources:
         # skopeo --override-os linux inspect docker://quay.io/keycloak/keycloak:<tag> --raw | jq '.Digest'
         image:
             repository: quay.io/keycloak/keycloak
-            tag: 26.5.7@sha256:45ae20191531eb608ddb0b775d012b40d3e4f942697f3214694887dd7c108d13
+            tag: 26.6.0@sha256:b0e5dbced1775de4d629f103c0a9cfc057decc62ce8d3cb1c54f8849a6c6eb62