"Cache" dashboard for ELK is not working

[HeshanSudarshana]

Description:
The Kibana dashboard "Cache" which is available in the docs [1] uses the faulty event stream instead of the response event stream. Therefore, data is not shown for the cache hits.

The exported json in the documentation should be updated to use the response event stream.

[1] https://apim.docs.wso2.com/en/latest/api-analytics/on-prem/elk-installation-guide/#installing-kibana

[Jithmi004]

Edited the visualisation and changed the data view to apim_event_response in the Cache Hit/ Cache Miss graph in Cache dashboard.