Ported fix from go-jira#510

Author: draghuram

search.go

@@ -72,7 +72,7 @@ func (o *SearchOptions) ProvideSearchRequest() *jiradata.SearchRequest {
 	return req
 }
 
-// https://docs.atlassian.com/jira/REST/cloud/#api/2/search-searchUsingSearchRequest
+// https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issue-search/#api-rest-api-3-search-jql-post
 func (j *Jira) Search(sp SearchProvider, opts ...SearchOpt) (*jiradata.SearchResults, error) {
 	return Search(j.UA, j.Endpoint, sp, opts...)
 }
@@ -108,7 +108,7 @@ func Search(ua HttpClient, endpoint string, sp SearchProvider, opts ...SearchOpt
 		if err != nil {
 			return nil, err
 		}
-		uri := URLJoin(endpoint, "rest/api/2/search")
+        uri := URLJoin(endpoint, "rest/api/3/search/jql")
 		resp, err := ua.Post(uri, "application/json", bytes.NewBuffer(encoded))
 		if err != nil {
 			return nil, err