Update expected policy

Author: jsoriano

test/packages/parallel/httpcheck/_dev/test/policy/test-eprcheck.expected

@@ -25,7 +25,7 @@ processors:
             - context: datapoint
               statements:
                 - set(attributes["data_stream.type"], "metrics")
-                - set(attributes["data_stream.dataset"], "httpcheckreceiver")
+                - set(attributes["data_stream.dataset"], "httpcheck.httpcheckreceiver")
                 - set(attributes["data_stream.namespace"], "ep")
 receivers:
     httpcheck/componentid-0: