[bitnami/thanos] fixes thanos querier sdconfig mount as file, not as path (#3789)

bitnami/thanos/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v1
-version: 2.4.1
+version: 2.4.2
 appVersion: 0.15.0
 description: Thanos is a highly available metrics system that can be added on top of existing Prometheus deployments, providing a global query view across all Prometheus installations.
 engine: gotpl

bitnami/thanos/templates/querier/deployment.yaml

@@ -116,6 +116,7 @@ spec:
       {{- if or (include "thanos.querier.createSDConfigmap" .) .Values.querier.existingSDConfigmap }}
             - name: sd-config
               mountPath: /conf/servicediscovery.yml
+              subPath: servicediscovery.yml
       {{- end }}
       {{- if .Values.querier.grpcTLS.server.secure }}
             - name: tls-server