docs(manage-resources-containers): add volume and volumeMount for ephemeral storage

Signed-off-by: Jai Govindani <jai@honestbank.com>

content/en/docs/concepts/configuration/manage-resources-containers.md

@@ -337,6 +337,9 @@ spec:
         ephemeral-storage: "2Gi"
       limits:
         ephemeral-storage: "4Gi"
+    volumeMounts:
+    - name: ephemeral
+      mountPath: "/tmp"
   - name: log-aggregator
     image: images.my-company.example/log-aggregator:v6
     resources:
@@ -344,6 +347,12 @@ spec:
         ephemeral-storage: "2Gi"
       limits:
         ephemeral-storage: "4Gi"
+    volumeMounts:
+    - name: ephemeral
+      mountPath: "/tmp"
+  volumes:
+    - name: ephemeral
+      emptyDir: {}
 ```
 
 ### How Pods with ephemeral-storage requests are scheduled